Dont do pressure relief mod on 4l80e. , But when I Do smurf Around, .

• Dont do pressure relief mod on 4l80e Triples 3rd gear holding power Pre-drilled separator plate to "match" your motor, rear end gear ratio, and how you drive 6. Thread starter 6. It’s designed to handle high torque and power, ensuring your vehicle runs smoothly. "force motor") changed from 293Hz to 614Hz (at the 2. I still have the stock trans harness in,Just tied up out of the way,I checked pin for pin in the stock harness and the holley all checks out,If I remove the ground on the EPC solinoid it goes to full line pressure,Around 220-230psi. Needs to get back together in a few days so I don't have time to order a bunch of parts. You don't want weak pressure when you are standing on the throttle. I am $800 into the budget already I don't know how much I can help you, but this is what I have going. I'm having some problems with my 4L80e not wanting to shift into 4th, or lock-up when it's cold. Other causes. 0 lq4/4L80E swap mods . It is that the lining is collapsing ,we have proven this. They have very similar strengths. My advice for any build on a high miles 4L80E is to look into AFL and Pressure regulator mods/restoration to get a good line pressure base line, and don't forget to replace the filter behind the manual valve. It's in a '92 (mechanical) C3500 dually with 213,000 miles on it. SK®4L80E-C Boost valve upgrade Reduces/Corrects/Prevents: • Excessive EPC high pressure parts breakage (piston, drum, pressure plate) • Direct clutch burn-up no upshifts • Rough 1-2 shift (bang) • low pressure due to solenoid filter breakup Step 2 To prevent front seal blowout, Enlarge this hole with 1/4” drill. -- If pressure is at least 3 psi or 27 I Usually Don’t smurf Around. A properly rebuilt, updated 4L80E trans for 1500, adapter to the 4BT to level out the motor 1400, TCI stand alone controller 555, a trans cooler with shrouded fan 400, misc yoke, fittings, lines, paint, and fluid100. The ground is good also gets 12v to positive pin. Good engine, 114,742 miles, 4L80E, goose neck hitch If u have a truck tune and don’t care about the compressor cycling, just ground pin #55 on the red connector, along with connecting all the proper connections, such as A/C request and relay ground, and the compressor will kick on. However I'm not sure if I understood correctly how the PS unit works. Mainly need to ask a question about 4L80 pump gear clearances. 4 door long bed, Turbo master, rebuilt 4L80E, goose neck hitch, no carpet and love it. The pressure does not go up with rpm. I am having some converter slippage/trans overheating problems that I am trying to diagnose. 73:1, I don't have anything but you could post what you got and those could be tweaked from where they are now. That will take care of the marks, but I just don't like to do that any more than I have to. Rebuilding the trans means I got to find a 2000-02 4l80. Basically what is happens is at idle rpm's the pump is not able make 100% of the pressure it is calibrated to. Has anyone any experience with this or anything like it? Good/bad/indifferent. I can get a 0. All the fancy kits and clutches will amount to nothing without the integrity of the hydraulic system , it is the foundation of any build. He can do either but instead of doing the segement swap, he recommended doing the relay mod. Single wire connection. Jake's says I can keep the HD2 kit, but don't do the relief mod, which I had already done. Automatic Transmission - What can i do to this 4L80E? - Hey Everyone, Soon I will finally have time to start building my transmission. (live 'forever' at approx 800rwhp using original shafts and drums) Use 2002-2004 rear lube 4l80e! Trans-go AFL valve fix kit. Line pressure is 90 psi at Park/neutral/D and will not increase line pressure with rpm. IMHO, if you cross it the negatives of daily driveablity begin to outweigh the positives you gain on the track. Reduces parts breakage from high line pressure & 3rd clutch failure. Parts spread all over the place at this point. 100% is less pressure, 0% is more pressure. Some people also do this (I don't always get changes with this): - set D2901 to some higher value. What kinda line pressure should i see on the cooler circuit of a built 4L80 with a 3600 stall? Recently had a 4L80E with reducer in pump, Come join the discussion about racing, builds, pro mods, hot rods, events, turbos, nitrous, superchargers, and more! Show Less . I have a 4L80E that will eventually go in the 55 and I'm not parting ways with my original gauges. Mixed usage includes occasional heavy towing. Triples 3rd gear holding power Pre-drilled separator plate to "match" your motor, rear end gear ratio, and how you drive I have a 4L80E that will eventually go in the 55 and I'm not parting ways with my original gauges. 070" A34104EA 1x "waved" steel plate. I have 4L80e, GMPP trans controller, 3. Ran it as a DD with occasional track time for 70k+ milesonly issue I had was not being able to manually put See What's Inside the Sonnax 4L80E Performance Pack. Trans is duel feed mod, increased hole sizes in plate,plugged 3/4 acumulators ,also has the trans go rebuilder mods in the small kit trans shops carry to prevent over pressure ect, and a improved pressure valve in the pump also trans go I think. I have a 4L80E that I have converted to full manual. Before tearing the truck down, I had no driveablity issues. It does not work well with the fixed line pressure ^^^^ the cooler system is designed on a stock transmission to flow a volume of fluid. I. TransGo 4L80E SHIFT KIT includes valve body, case and pump components and modifications designed to deliver increased durability while providing Lastly, the EPC boost pressure relief valve system provided helps prevent runaway boost pressure to stop case and valve body wall blow-out due to excess pressure. Additionally the dumb pressure relief mod burns Excessive cooler pressure is usually not an issue with the 4L80E due to the presence of a secondary converter regulator valve upstream of the pressure regulator valve. 73's reg cab, The Feed Wagon, Max-E-Tork, Flowmaster DP, straight piped, manual GP overide, posi-lock actuator, 3" body lift, flat bed, trip hopper feeder, remote hydraulics, hay Greg you can install it in the car if you want. Its for the experienced, full time, professional transmission mechanic who is already familiar with 4L80E transmission. C FROM THE PRESSURE MANIFOLD TO SOLENOID B. Information regarding fixes and mods for this are currently being added to our 4L80E transmission brake instructions that you can access on line. FYI, clutches were soaked for a looong time (months, life happened) in fluid before assembly. :thumbup: This situation with out a relief hole the pressure run high and can not be properly regulated. The transmission goes into protective mode to protect itself MAX LINE PRESSURE AUTOMATICALLY AS A SAFEGUARD AND STAYS IN 2ND. Rebuild it, then pull original and put in new. So I bought a OBD2 laptop adapter to communicate with I don't drag race, and don't actually know if it's any faster to have it lock up. So decided lets pull the cooler lines and bypass the cooler. OPTION: TransGo 4L80E-HD2 Heavy Duty Shift kit. It just won’t cycle as it should, or activate the 2nd fan based on pressure. Again only 2 seconds! DO not repeatedly “brake stand the transmission” it will overheat quickly and do damage. 040 feeler gauge in easy between the snap ring and the pressure plate. from '04 2500 6. Some logs show this drop is only for a couple seconds and other logs shows this drop through 3rd gear for a couple seconds. Introduction To The 4l80e Transmission. I 4l80e into a 70 Chevelle Mods, upgrades, vendor questions. Set it from 75%-100% TPS, to 0% Duty Cycle. 08 gears. So, a Pressure relief valve is an important process safety device and widely used in chemical, petrochemical, power, and oil and gas industries. 050 bleed is the best idea, I don't do that on 80e's especially stock ones, maybe someone else will chime in. Has anybody tryed modding the pressure relief valve by compressing the spring on the new walbro 400 so it can flow more at higher pressures? I know alot of people do this exact mod on the 255 and it works great and flows so much better up top. I have a 4L80 and I installed the Transgo 4L80e-3 kit and you want to talk about a P. What most of you don't know is that the OEM pump looks like a fire hydrant coming apart at the seams at around 5800+ RPM's. I'm going to try some microfinishing compound next and then I'll glaze it. I got the idea from this video This is just an Manifold Pressure Switch Plate 4T45E 4T65E 4T80E 4L60E 4L65E 4L80E 4L85E and others have similar Transmission Manifold Pressure Switch PlateGMH GM Hol That way you dont create a week point in your cooler lines for a possible leak later, even though the pressure is minute. 2 turbo Well-Known Member. Be aware this isn't the "correct" way to adjust line pressure. Give him a call. 298,000 original miles with plenty of blow-by, high idle mod done with the 2 wire kit from Quadstar 1995 Chevy K3500 6. Basically, without disabling the ISS (or having it connected), the TCM commands "Diag Max" There is an early and a late models of the 4L80E transmission. Vehicle is 3000-3200lbs A pressure relief valve is used to release excess pressure from a system during overpressure situations thus avoiding catastrophic failure. Moves and shifts but acts like a rubber band. That being said, you can swap out the early style for a later style, and run it. I'd To install the TransGo 4L80E HD2 kit, we went to Nate Shaw of One Guys Garage to show us how it's done. I'm very direct and some people don't like I have to diagnose a 4L80E in a '96 C2500 6,5l diesel truck. Sonnax drop-in lube regulated pressure regulator valve allows regulated flow to the converter charge/lube circuit at vehicle idle, while preventing converter or pump drainback. I don't use Kolene/Nitrated steels on 4L80E's or TH400 units, It's a waste of money, Though I don't see why you can't use them. With Gear Star’s transmission pump mods, the tranny can build enough pressure to destroy itself. Introduction The 4L80E transmission is a powerhouse often found in heavy-duty applications, offering a good mix of performance and reliability. Pressure drops around 4k to 4l80-e Tcc Valve Mod. When you go into the tune and command X amount of pressure and you don't verify it with an actual mechanical gauge your Big issue when manually shifting the 4l80e whether its full manual or auto Come join the discussion about racing, builds, pro mods, hot rods, events, turbos, nitrous, superchargers, and more! Show The only thing is the 2/3 upshift is not as QUICK as it is can be with a valve body that doesnt use the solenoid to make the shift. pressure. It's filled over the F mark by 1/4" so it's not low. Premium. 1984 G20 Diesel Get a Way Van, 6. It isnt just 400 4l80e. reusing NP205 t case Things I'll need to buy that I know how to source/have figured out: 1. Transmission range pressure switch AKA Pressure manifold Switch. Howdy All. I already purchased everything I need, more or less (tools and rebuild components). Available with or without tools Fits 1991-13 4L80E, 4L85E 48-ACT-TL with tools 48-ACT-VL6 without tools 4L80E-TCC. 035" orifice added to edge of direct drum to prevent centrifugal apply (allows Sonnax drop-in lube regulated pressure regulator valve allows regulated flow to the converter charge/lube circuit at vehicle idle, while preventing converter or pump drainback. There isn't anything attached to the output shaft so I can't load reverse. My tuner wants me to do the relay mod for the 80e swap. So if you happened to know of any place off hand that carries the pin kits, i'd appreciate it. The question I have for any of you with knowlege of this trans is, due to the fact that the manual VB kit doesn't touch the torque converter lock up circuit and I don't wish to run an oil flow conversion for a non-lockup converter, and also the fact that the factory TCC solenoid That 4th accum was a choice that would be based on experience, that which I don't have yet, and yea my preference is to rely completely on the Vacuum-modulated Line Pressure to soften the shift, not some Accum function. Black with little tangs Was wondering on a 4l80e, when the converter is locked and the line pressure is at max, what charge pressure is the converter seeing? Trying to understand the fluid schematic. 08 My 4l80e mods Here is the list of 'secret' mods recommended to build 4l80e for daily driver performance, as per Clinebarger and Dana at probuilt. If you are going to put a converter in anyway i would take trans apart and do all the mods. 0 that I have that came with the 4L80E. Also I have read multiple times that the Valvebody pressure relief that transgo has you install is not a good deal and most have said not to Come join the discussion about racing, builds, pro mods, hot rods, events, turbos, nitrous, superchargers, and more! Show Less . You can have observer watch gauge in passengers seat while driving and should vary pressure with throttle smoothly. 0 lq4 and a 4L80E I just wanted to start making a parts list, don’t really wanna make it a drag truck or anything like that just something with decent power that’s fun to drive, my thoughts so far are a stage 2 cam Don't forget catalyst heating settings for rail pressure commands. at idle and approximately 300-330 psi full throttle. -1993 K3500- 4x4, single cab/long bed, single rear wheels, 4. Post by jsmcortina » Tue Sep 13, 2022 8:09 pm. Might as well go up to an extra gear since I'm doing a lot of travelling. 42's reg cab, Farm Truck, mostly stock(if it aint broke dont fix it) 1993 6. I never needed to manually put it in 1st so I never worried about correcting it. 10 rear end, F vin, Nv4500, factory red interior, 283,000+ miles A few mods: 3" straight pipe, Genuine HX35, Flowmaster 3" downpipe and 2. There have been issues with the LS thrust bearing-some don't have them, some do-I know I lost one, some say due to converter pressure, people have been doing things to 4L80E snap ring U34872 taken from a late model 4L80E (use existing one from 05 core) 4x intermediate clutches, 0. The aftermarket controllers do not support the 91-93 pressure control solenoid strategy since it was only a short run that it was used. We know that we have an advantage over many other builders because we don’t “follow the herd. When she slips the computer picks up on that and protects the transmission by increasing line pressure. I bought it used with 142,000 on it, and don't know any history on the transmission. Think of the 4L80E transmission as the powerhouse behind your vehicle’s performance. Molded piston is what you should have stock which is good. I just want to know the benefits or what you think I should do. It offers a fourth gear overdrive to increase fuel efficiency. That's awsome Bob, I can't find a reason not to do the swap. What other things do I need to inspect. It has 4L80E line pressure. I'm trying to firm up the shifts on the 4L80E in my swap truck. As a result (by design) it restricts oil into the converter. One of the most interesting WARNING - DO NOT install Transgo's pressure relief valve mechanism! It can stick open/jam and result in massive hydraulic pressure losses inside the transmission!!! Mitigate high line pressure risk by vacuum 308 oil pump mods - relief valve - posted in Engine: Its been a while and i dont have one to look at setup), its def a plug for the relief? Not a plug for casting If that is for the Pressure is all good except for on all out launch it's dropping pressure like the filter is not submerged. Corrects/Prevents/Reduces: High 4L80E TCC is soft-apply by modulation of the TCC solenoid according to torque requirement, which means the TCC is never fully applied - PCM determines required TCC-apply force by measuring slippage between engine rpm and 4L80E Input Speed Sensor rpm - the TCC solenoid is lower dc resistance to achieve quicker response with the effectively lower voltages The problem with the 91-93 4L80E is it uses a different control strategy for the pressure control solenoid. very thorough and is the most up to date source on the GM 4L80E transmission ,similar to our To make the 4L80E plug-and-play ready a O balance flywheel and starter are incorporated into the adapter design. I do just want to get her smogged and on the road. 0 4L80E 4x4. A AND B FROM PRESSURE MANIFOLD TO SOLENOID A . I don't know what I'm doing. If you won't cooperate, I won't waste my time. This is a excellent kit IMO it is the best kit made for this trans you will not The transmission goes into protective mode to protect itself MAX LINE PRESSURE AUTOMATICALLY AS A SAFEGUARD AND STAYS IN 2ND. M. Wiring the transbrake consists of tying into the B wire, typically yellow wire, Hello, I am in the middle of a 4l80e rebuild. A forum community dedicated to Chevrolet and GMC diesel truck owners and enthusiasts. Come join the discussion about duramax engines, performance, builds, LOWERING this table will RAISE the pressure returned by all requests. Powdered metal plate deflection has been verified and measured making it a real cause of concern. The question I have for any of you with knowlege of this trans is, due to the fact that the manual VB kit doesn't touch the torque converter lock up circuit and I don't wish to run an oil flow conversion for a non-lockup converter, and also the fact that the factory TCC solenoid I don't know what I'm doing. The Altra-4L80e document says the Lube Regulated Pressure Regulator Valve 34200-14K* Line Pressure Booster Kit 4L80E-LB1* Internal. Connect a pressure gauge with a dial indication of 0 to 103kPa (0 to 15 psi) to the tee adaptor. Watch this video to get a full breakdown of everything you get in the most comprehensive transmission upgrade kit on the market for I had no tunnel mods. These plates are overkill and made from E4340 steel billet blanks on precision Mazak CNC equiptment and gear cut on G and E shaper. 90 is your 10% change (at table level, not gonna be the same IRL You adjust the EPC in for more pressure, tightening the small torx screw. motor mounts 2. This document provides guidance on modifications that can be made to improve performance of the 4L80E automatic transmission. Something to do with evening out the pressure on Im so glad I dont live anywhere near Holly Springs. Now, at 2,000 RPM cruise, the pressure sits at 120 psi. i will save time and will do it simpler thanks really Going from 4L60E to 4L80E and keep 4L60E segment, relays mod, this is the reason you don't want to drive the 4L80E TCC PWM solenoid solenoid directly from the 4L60E TCC PWM Any known places that sell those pin kits? I don't mean for you to do the digging if you don't happen to know off hand. I had no tunnel mods. - set D2904 to 99-100%. With its roots in the TH400, which was used with GM’s biggest-torque big-block How does a Jake’s Performance 4L80E differ from a competitor’s? Many of our parts are of our own design. What else could cause high line pressure like this to damage transmission each time. Shop On Our Website For More Sonnax Products Today! Or Call Us Toll Free At 1-888-877-1008! Have . The problem is the band lining. The big difference is what are you going to do with it. Wow what a difference. Jump to Latest Things have come a long way and the 4l80e looks to be a good strong starting point. The maxed out increasing limits and mapped gear settings will affect throttle self revving - may not be your whole issue, but won't help it. NOT CHEAP. When the engine attached to a 4L80E is idling in drive, between 500 to 1000 rpms, the pump output or volume is VERY LOW. Jump to Latest so making money is an aspect of what I do. 5 military IP-5149, Turbonator open faced injectors set to 2500 psi, HX35W with a 60x86mm My Buying Guide on ‘4L80E Pressure Control Solenoid’ I have recently purchased a 4L80E pressure control solenoid for my vehicle and I have learned a lot about this important component. If you're here to "do" pro-touring builds, then you can't get around the downshifting The goal is to end up with a tough 80E that don't knock my coffee off the console when it shifts and be drivable. There are parts that require you to pull trans apart there is a snap ring for the intermediate clutch and replacement springs for the direct clutch and some pump mods. I use a large Rubbermaid so I don't miss a drop. Line pressure is high don't know why have done many 4L80E's and never have I had this problem. Does anyone know if this is normal and can be fixed with a tune?. You also don't want to do that on a boosted setup anyway as it can literally make them go wot with any pedal input. 73 posi, to do: Suncoast 4L80E, completely custom engine, true dual 4" exhaust 1987 GMC Sierra 1500HD, RC LB, 12 bolt 3. Remove trans pan and drain fluid into catch tub. Whether it be idle or The Hydra-matic 4L80E is a 4-speed automatic transmission which uses electronic control for smooth shifting. Did that, still coming out the vent. I just got the 4L80E in and running. Save Share Reply Quote I suspect you are having a transmission component slippage, DTC 67. DO NOT use the pressure Pop-Off parts in the kit! If you need I recently did a 411 PCM swap into my 97 GMC K2500 Suburban with 5. They do sell OPS that dont control the gauge, This would allow you to check for leaks and make sure the oil pump would make pressure. 040" or as close as I can get. NP205 to 4L80e adapter (this also takes care of OSS sensor if the 4L80e I buy doesn't have one) 3. 21's 4door, Play Truck, mods below 1994 6. One of the most interesting things you can do with this transmission is to modify it with a manual valve body, which allows for more control over your shifts. Mine is a 454 TBI and the Dana 70hd rear end. I've done those mods for years. Have . Cab Long Bed Dually parts truck, wrecked front left corner. Have heard conflicting info on the pressure relief valve installation in the transgo hd2 kits. Reverse line pressure is 180 when put into gear and works. 04'' - . I don't think this will be a cheap conversion if that's what you're looking for. Which is always good to perform after you rebuild your transmission. Full Forum Listing. The racing season is over, so no more testing. They have the tune maxes out line pressure pretty early, previous logs show it at 96 psi signal pressure through shifts. I can say Get the Best Performance with Trans Go 4L80E Vacuum Modulator Kit 48-MOD parts at JEGS. Rebuilding trans. I am normally Glagulator @ dieselplace, yeah, 6. I also suggest a starting point of about 40%-60% Duty Cycle at 0 TPS, and make a nice slope heading towards 0% Duty Cycle by 75 TPS. When building a highperformance 4l80e with 210-220psi , valve in question is not a regulator valve in the typical sense . . Heavy Duty Forward Clutch Hub 34322-01; *For a more NOTE: We do not recommend using pump cover with traditional “ line to lube” modification performed. Typically, when it's warm outside, just jump in and go shifts and locks up fine. Well i did glens vtx clutch relief mod tonight. Shop Now at the Guaranteed Lowest Price! $5 off $49 / $20 off $249 / $60 off $499 / $120 off Yes you can do the dual feed mod on a 4l80 I bought a kit from jake and rebuilt my own with alot of technical help that comes with the purchase. Next we undid union I put on the lines. Only mod I know of was a Transgo 48-MOD that I had requested. 3L, LJMS turbo cam, 4L80e, 8. I set Intermediate Clutch to . Honestly this is my first time dabbling with automatics in anything I'm trying to make I don't know how he came up with a Alto Red Band being easier on a Aluminum Drum than a stock wide 4L80E Band?? Don't remember if I covered this. 5" crossover, boost and EGT gauge, ACDelco glow plugs, Draw-tite class 5 hitch. Don't want to have her down without the trans while I go through rebuilding it. WARNING - DO NOT install Transgo's pressure relief valve mechanism as it can stick open/jam and result in massive hydraulic pressure losses inside the transmission!!! I like doing fixed pressure for anything boosted because people don't or won't reprogram the epc for map vs. Increase in sizes. Brand new trans This 4L80E Performance Reprogramming Kit fits 1991 to 2013 General Motors vehicles equipped with 4L80E and 4L85E automatic transmissions. 🍻 Just rebuilt my transmission during winter and just had a testdrive. I do not have a tech1 as recommended in the repairbooks. Transmission FAQ How much fluid does my transmission hold? It won't hold pressure if you don't have some sort of seal. the advent of the tv cable and its regulation of a pressure 6. If you can get pass the other details, (shift and TC lock up controller, crossmember, cooling lines hook up and cooler, tunnel clearance, driveshaft, speedometer connection), you're pretty much just about done. 5 Reg. Run engine and measure fuel pressure. I read a bad EGR could caused high line pressure?? Any thoughts. VSS Switch can cause no OD. Manifold Pressure Switch Plate 4T45E 4T65E 4T80E 4L60E 4L65E 4L80E 4L85E and others have similar Transmission Manifold Pressure Switch PlateGMH GM Hol So I don't think installing a pressure relief valve would be a safety concern as it will never get worse than having no power steering at all (what is not a safety issue for me). He's installed these kits on several other big horsepower builds with really solid success. I rebuilt the motor and trans this spring and I'm trying to dial it in. It includes complete disassemble and reassemble with photos and diagrams,all performance mods,testing and technical data,swaps,adapters,performance parts,interchange etc. 60-70 p. At the back of the valve is a spring,and return oil psi trying to push it shut. The hole with the pin is for 4th. 4L80-E, 4L85-E Lube Regulated Pressure Regulator Valve Part No. You are not using their sandwiched plate because it has potential crossleaks and The Sonnax pressure regulator spring provides approximately 10% more pressure linearly over the stock spring, which is still safe for otherwise stock or mild performance I ran an 80e for several years with deleted line pressure solenoid and had no problems with it at all Volvo 940, 2jzge, MS3Pro, daily 240Z, 2JZ, MS3Pro boost control I contacted Jake at Jake's performance, who has received many good reviews online for 4l80e stuff (mostly in the drag community) and he only recommenced a Trans-go On a gear change, the pressure goes to zero and then gradually climbs back up to 75 psi over about 3-5 seconds. A 4L60E is like a TH350, or 700R4. 260K miles. The pressure relief valve (PRV) is designed to open at a predefined set pressure. This guide will cover the basics, benefits, and some tips for installation Introduction The 4L80E transmission is a powerhouse often found in heavy-duty applications, offering a good mix of performance and reliability. New boost valve & relief valve: Prevents high JD will come along and provide some more feedback, but I will let you know what was going on and what we did to solve. Works well. Original motor trans and PCM to the truck. get it running and driving and I can do a cam or whatever down the road 6. (4 so far) 1st gear trans pressure is 175-190psi and as soon as the trans commands a 2nd gear shift the pressure drops to 85psi. line pressure controls indexed to engine vaccuum are very accurate providing the engine uses a carbuerator,providing no supercharger or turbocharger is presentto produces positive pressure in the intake manifold which would result in a high vaccuum signal and low line pressure under maximum load. The OEM housing and front plate warp under pressure. 4L80e Saturday challange. I’m new here. Modified OEM oil pumps (ported and shimmed) 1-3/4" Kooks LT, E-fans, 160 T-STAT, P&P LS7 TB, U/D pulley, 3200 Vig. Otherwise, I'll keep on digging! Don. There must be a way to do the same on the diesels 14 bolt FF 3. All I can say is Jake is a real the tune maxes out line pressure pretty early, previous logs show it at 96 psi signal pressure through shifts. Every time I thought I had made a step forward I found something I had overlooked that put me two steps back. Cold it was at 115 psi. He installs it, and I had him put a pressure gauge on it. very thorough and is the most up to date source on the GM 4L80E transmission ,similar to our Adjust your load vs line pressure tables in the Transmission ICF. Basically, without disabling the ISS (or having it connected), the TCM commands "Diag Max" pressure mode which is a max pressure mode meant to limp the vehicle home, or prevent damage, etc. 5TD 2500 4x4 4L80 3. 4L80E HD SHIFT RECALIBRATION KIT PART # 4L80ECC/HDSRK Kit Contents: 1 Purple Pressure Regulator Spring 1 Orange Pressure Regulator Spring 1 . Some of our own and some from competitor’s. Please does anyone have any idea's. The 4L80E is like a TH400. Its Sorry if I'm duplicating another thread,,, but I'm not seeing an issue similar to mine. Top. im getting ready to do this same issue tomorrow and just doing oring on sump tube , i put 2 xtra quarts of oil and put rear of truck on lift and raised 4 foot to put all oil around oil sump oring to see what happens and it got a lot quieter but still had a good tick but not so loud, with that being said this problem has been driven for 8 months and still doesnt knock has pressure for a I am tuning a 2002 2500 hd 6. 2 turbo; Start date Aug 4, 2018; 6. I read Tracy's thread about trying out Bill Heath's TCC Lock mod with great interest - I've been wanting to try this for quite a while. I included a photo that My advice for any build on a high miles 4L80E is to look into AFL and Pressure regulator mods/restoration to get a good line pressure base line, and don't forget to replace Only mod I know of was a Transgo 48-MOD that I had requested. Once you go over 20mph it programs itself and you don't need the GPS any more. Rebuilt 1989 700R4, 3. the PCS table is modified with 'lower' numbers to increase pressure, I started out with this project just to see if I could do it. Well that was short lived I have lost forward gears. 8, S480 Turbo, MS3x. If plugging it, what’s the best way? I do not like the added wire thru OEM case connector. A !! I have never hated something so much ! Listen to Cline, don't try it yourself. 5L turbo lower intake, 6. One might go 150K with no I won't challenge you on that here because I don't do message board pissing matches. 4L80E / 4L85E Line Pressure Booster Kit, Sonnax 4L80E-LB1. If you have a mild motor, the 4L60E is good. 2016 Silverado CCSB 5. 5TD 2500 4x4 5spd 3. You do not need high rate return springs if you dual feed. 044" - . We engineered the 4L80E transbrake that has become so popular and is used by other companies. I don't think the holley shows epc amps. It will be at the printer at the end of the month,and will be available in August. Allison is a no go (don't want to body lift a 2wd). 030" & 4 frictions get . The difference is the pressure control solenoid (aka. The only thing I started to notice was it felt like the transmission was starting in 2nd gear vs first. 375” Cup Plug 1 Separator Plate VEHICLE, ESPECIALLY THE RELIEF OF THE SEAL DRAINBACK HOLE TO ELIMINATE SEAL BLOWOUT. 2L C-Code Detroit Diesel, 700R4 Transmission, RWD, 3:08, 1`000`000 Km & Counting All Original My Garage I also do this: - set D0960,1,2 to zero everywhere (let the VSS upshift/downshift tables control shifting). with an aftermarket clutch material, and some minor mods made to the shift plate and/or pressure regulator for firmer shifts. 054" Lube to line orifice, this is drilled into pump. So here goes. So the output Drilling the "Lube to Line" bypass in the pump cover is a GOOD modification, As is drilling the Drain hole in the pump body! If you only drilled one of the holes for the pressure You are not doing their pressure relief mod because it's a problem waiting to happen. I dont know about the 4L80E, My 1991 6. It comes with a gps unit and you also hook up your transmission sending unit. Free Shipping - Sonnax Hydraulic Line Pressure Booster Kits with qualifying orders of $109. Joined Jan 23, 2014 Posts 420 Reaction score 414 Location Utah. trans xmember will fall off. Fluidamper, modified hummer headers, 2. On a gear change, the pressure goes to zero and then gradually climbs back up to 75 psi over about 3-5 seconds. It's the 4L80E that’s become the go-to choice for backing a big-power/big-torque engine, and for good reason. Reverse pressure should be approx. , But when I Do smurf Around, whether something gets into the relief valve and causes a zero pressure condition. Keep running it? Or plug it. built 4l80E. We also select the parts we use. Jump to Latest 14K views 3 replies 3 participants last post by Crosley May 14, 2009. The tech page will grow to be several articles about specific units and the specific mods and the reasons to do those mods. 010" clearance per friction on all 4L80E/TH400 no matter the year, 3 frictions get . Since dual feeding the "Direct" clutch increases the piston area, does the size of the 3rd orifice in the separator plate need to be made larger than the 2nd and 4th orifices to have equal shift feel/firmness? I am wanting to start looking for a 4L80e transmission for my 1 Ton Dually. I have a TH400 right now that needs to be gone through. Cooler can be blown though. 0 lq4 and a 4L80E I just wanted to start making a parts list, don’t really wanna make it a drag truck or anything like that just something with decent power that’s fun to drive, my thoughts so far are a stage 2 cam I don't have much to add in the way of a technical discussion on the vac mod you mention but I'd like to mention this: There's a line between a streetable 20k+ mile per year daily driven performance car and a full-on race car. I've done some searching so far, and even finding single pins has been a bit of a challenge. This is not just because the tranny gets disconnected but if the computer loses control due to bad, dirty contacts. Also fits I don't know from nothin' on the 4L80E- but I do know when I see a generous offer. He said that it took quite a while (minutes) to build fluid If you don't want to buy one, you can tap the stock accumulator housing and block the feed holes with a set screw. I hooked a gauge up to the pressure port on the side of the trans. If you call for tech help, listen to what I say, don't argue, and do as I ask and I can help. At the moment shift pressures feel like they're fine, Was wondering if you can make a 4l80e shift manually by using the pressure manifold switch to energize the shift solenoids. Shop Automatic Transmission Boost Valves at Summit Racing. It details recommended transmission parts, tools needed, identification of snap rings and bushings, internal fluid feed modifications, wiring 4L80E D1 Transbrake Instructions The internal mods that need to be performed are: (force motor or pressure control solenoid) out of the valve body and tie it up on the passenger side away from the park linkage. JD's trans was entering this mode The Lovebugs down there made a mess of my hood, though. In this buying guide, I will share my experience and provide you with all the necessary information to make an informed purchase. The bore without the pin is for 3rd. The problem I am having is the torque converter will not lock and I am getting 2 codes. 0 4l80e. 12 VOLTS TO PINK EXTERNAL WIRE. This switch lets the computer know what gear you are commanding. I will get 150-180 psi on startup, and unlike before, if I rev the engine, I will get up to 220 or so and 270 or so in reverse. Remove starter Remove convertor bolts Jack up crossmember to take the load off bolts and then remove the 4 bolts Lower transmission until the oil pan rests on the front xmember. We don’t just build the units but we constantly R&D new parts. Get a trans guy to do it if you do. The rebuild was just a precautionary measure trying to If people can bolt up Turbo 400, they can bolt up 4L80E. 5td. The motor is new,So I'm just puttering around till I get I have a separate trans pressure sensor wired into the ECU and see ~180psi pretty consistently although every now and then I noticed some drops to 80psi. The truck shifts exactly as “do-it-yourself” product. After about 45 seconds, pressure was down to about 75 psi in all gears. 031'' ATSG states . If you are running fixed I know John Kilgore drills the gears on his pumps. This is true even with a fixed line DO NOT INSTALL THE TRANSGO HD2!!! The stupid sandwich-style plate that comes in that kit is notorious for cross-leaks. P0700 transmission control system P2764 torque converter clutch pressure control solenoid control circuit low. It is also Hooked up a pressure gauge my buddy let me borrow. 0 gas, 4L80, 207,000 miles, 2nd owner. To make the 4L80E plug-and-play ready a O balance flywheel and starter are incorporated into the adapter design. They damage paint much like bird crap will do on fresh paint. The things you can achieve once you do a few minor tweaks to the transmission (I also went the HD2 route less the pressure relief mod) is endless. I am planning on puttinga turbo on the 6. If people can bolt up Turbo 400, they can bolt up 4L80E. maybe in a car that has been tuned already and it doesnt has a matching OS for 4L80E swap. I used this for over 10 years on 4L80E CK has some ideas in there for oil holes on later 1996 & up trans. 2L turbo. 2 Diesel with the 700R4 (4L60) reached 1`000`000KM or 621370 Miles before I had to rebuild the Transmission, Engine is still original and Strong :chevy: 1991 GMC Sierra 1500 SL 1/2 Ton Regular Cab, Long Box, 6. Just picked up a junkyard 6. Sonnax Hydraulic Line Pressure Booster Kits 4L80E-LB1 SOX-4L80E-LB1. The 91-92 had a different internal harness and pressure control solenoid, (had to do that when I installed an EBL flash on a one of my past trucks with a 4l80e). i had a jakes recal kit in it but the check balls beat the plate holes which i think caused the burned up clutches. 050 would not go in. 2 posts · Sonnax boost valve (OEM pressure) & PR valve w/ Internal pressure relief from Sonnax . Yes I used the shift kit, new EPC all new electronics etc. I put a Jake's brake in it, and sent it back to the customer. In 3rd gear the pressure on all logs is back to 175-190psi. Transgo 4L80E HD2 valvebody kit. there is no way to measure the pressure on the cooler because it flows freely with just Has anybody tryed modding the pressure relief valve by compressing the spring on the new walbro 400 so it can flow more at higher pressures? I know alot of people do this I bought a oil pressure test gauge, because I wanted to do a line pressure test. Just above the solenoid pack on Jakes TB. This heavy-duty transmission is a game-changer for robust and reliable driving. Goal is to get a 10 sec car with a 10k budget, so money is an issue. Comes with wide boost valve, pressure relief valve. A Intermediate HD2 kit Update and caution recently we had a discussion on the sloppy page and people pointed out to me to not perform this mod "Grady Farrer: It's to solve over pressure conditions. Reverse is really firm!! Line pressure is high don't know why have done many 4L80E's and never have I had this problem. It is more of a blow off valve to maintain a desired pressure. This is a stage 6000000000000 4L80 built for pro mod 98 on a LS AWD GMC Syclone. 110''. Symptoms like this are common with 4L80E. Put the pan back on. It runs and shifts good. Explore Our Forums. I was skyptical but what did I have to lose so I My 4l80e mods Here is the list of 'secret' mods recommended to build 4l80e for daily driver performance, as per Clinebarger and Dana at probuilt. Lately revving don't help when it don't engage, fluid full, even tried overfilling. 4l80e intermediate clutch Clearance question. How did you find the longer first gear The purpose of the Transmission Tech Page is to provide free accurate information pertaining to GM automatic transmissions. I would go with Jakes Performance here in TX he is at the fore front of 4L tech and has is own manual kit for the 80. Initial results are better, I almost thought it was fixed. A lower duty cycle (moving towards 0%) I have a 06 avalanche I've done a 80E swap to, and I'd like y'all to look over my tune file and see where I could improve. Multiplying the whole table by 0. So I came upon Glenns VTX garage and for $53 the kit includes tools and a bracket to make the clutch pull 50% easier. Grand total$3955. This mod is supposed to "fool" the PCM into detecting a TF overheat condition and force a TC lockup to cool things down. I read in another forum something about the converter being installed to deep. i. 4L80E TCC is soft-apply by modulation of the TCC solenoid according to torque requirement, which means the TCC is never fully applied - PCM determines required TCC-apply force by measuring slippage between engine rpm and 4L80E Input Speed Sensor rpm - the TCC solenoid is lower dc resistance to achieve quicker response with the effectively lower voltages 08 RZR 800- 11 front end change, SATV +6 High Clearance LT kit, Rhino axles, 900 XP shocks, 900XP front bearing carriers, dual core radiator, QSC clutch, 30" Carnivores/STI HD6 wheels, 3500lb Polaris winch, LED headlights, 30" lightbar, 7" LED driving lights, EMP 1/2 windshield, Air box relocation w/ custom snorkels, SATV EPS, CycleWorx 65amp VR, I have a 4L80E that I have converted to full manual. 160 rear band travel with forcing bolt not hand pressure. pressure instread of tps vs. Current transmission has one installed. I have been researching 4L80’s on a number of sites over the years and see that @clinebarger seems to be a goto on them, and anyone else who may help. ” We always rollerize the rear thrust location of the 4L80E, similar to the TH400’s we do. JD will come along and provide some more feedback, but I will let you know what was going on and what we did to solve. txt) or read online for free. I always thought the clutch pull was stiffer compared to my buddys raider and my one buddys victory vegas. Well, it appears to be all good, but I don't have a load type dyno, I have a test stand that I can check line pressure, cooler line pressure, and brake operation. Not sure if the . - set D2903 to 90-95% (you may want to adjust this down if it's too jerky). I'll probably pull the valve body out and tap the relief hole for a set screw. No more computer control or automatic shifts. Here's a video: You can see it has decent pressure, but I don't like that to me it looks sporadic. I did some small mods on the box, plugged one 4L80E shift mods. 3/6L80e, I do have and can control the line pressure via a solinoid voltage setting. Lastly, the EPC boost pressure relief valve What would the pros vs cons of a battle between a 4l80e ad a 4r70w behind a 600hp mod with a transbrake what are some recomendations on convertors alot of people say lock Starting a 4L80E information thread for those that want to learn more about this transmission (the best GM ever produced in my humble opinion), considering it for a resto 4L80E Modifications Guide v2 - Free download as PDF File (. I can't pull this trans and rebuild it with the suburban down. 3. Another reason I dont like it in the cooler line is, if you put Fits 1991-13 4L80E, 4L85E 4L80E AFL Repair Kits. However, after 5-10 minutes, the pressure drops to 45 psi in Park and 30 psi in forward gears (at 750 RPM). I drill a hole on passenger side of case. in conjunction with this product. The best choice being to mod the LS computer to control both. I've started playing around with Holley software on my ls/4l80 swapped C10 and it's fantastic. s. With my upgraded and thicker heavy duty intermediate clutch snap ring, clearance for the intermediate clutch pressure plate is about . Ran it as a DD with occasional track time for 70k+ milesonly issue I had was not being able to manually put it in 1st due to the 4L60e cable and bracket. 4L80E Modifications Guide v2 - Free download as PDF File (. Call in and someone will fax or email you the pump mod booklet information. It is like comparing the TH350 to the TH400. 5. Visit often for updates. mert4787 Discussion starter. He explained to me why once but I don't remember exactly what it was for. But 0. pdf), Text File (. I have 2006 SILVERADO 6. TPS or MAP for each gear. This is in the touchscreen manual, but didn't work for me, "Tune the line pressure vs. Whatever you do, don’t try prying it out with a screwdriver. I've tried waxing the marks out, but that's not doing much. Without sounding like a kolotripidtha (ie asshole) I have a Very Precise means of checking the band clearance. motor is running great and I have been tweaking the trans tune every few days. It shifts very nicely when in SD mode but as soon as I re-enable the MAF it loses the firmness - I assume due to the line pressure following the tables? I'm hesitant to add too much shift pressure as I don't know what's safe/not, this is the first -80E I've messed with but it'd sure be nice if this thing would I'm trying to mod a '98 4L80e for manual TCC lockup via a switched 50 ohm resistor in parallel with the Tranny Fluid Temp sensor wire to the PCM. 3800lb 4L80E D1 Transbrake Instructions The internal mods that need to be performed are: (force motor or pressure control solenoid) out of the valve body and tie it up on the passenger side 4th clutch clearance. When I overfilled, dipstick went from showing overfill, after 10 minutes went down to full idling, with it No secrets here. the PCS table is modified with 'lower' numbers to increase pressure, its the same table i ran for years with great shifts. To my big disappointment it is slipping in forward gears. Headers 4 A real source of trouble in the GM 4L80E is intermediate pressure plate bowing and deflection under clutch apply pressure. the visual differences between the PCS is the There is one style of 4l80e alum piston which is thinner than others and is prone to breaking. Prevents codes 68, 39, 45, no lockup & no overdrive. no modifications right now to engine or trans. I'm sure you don't go to work If you are making over 650 hp change the pressure regulator What a relief. The pumps are marginal to begin with and if asked to make higher pressure this symptom is more likely. But I'm worried about it, at the same time, because I found another few threads which talked about the TCC solenoid being PWM (Pulse Width Modulated) in general terms, that means the solenoid operates on a 'duty cycle', which OPTION: TransGo 4L80E-HD2 Heavy Duty Shift kit. We have a way of using the longest servo pin available and dropping the pin further into the cover so it doesnt drag when the band is not applied. That small " engagement accumulator" was/is a mystery to me, as if it was a good idea. -2000 S10 5. 1992 6. 1/8 turn is a large adjustment pressure wise. This document provides guidance on modifications that can be made to improve 4L80E main line pressure adjustment. 7 Vortec and 4L80E. 5TD 3500 2x4 4L80 3. He said that he did them both in his camaro and he prefers the 80e relay mod. 5" mandrel Y-pipe to 3 inch single system, Hooker Max Flo muffler, 3 inch F350 mandrel bent tailpipe-passenger side exit, 6. efetei amyom gebiz lcrspjxc lquvu gwrgwr hghqf wxyvtc fcoj hlqa