6l80e tcc problems. Sonnax has the answer.
6l80e tcc problems. A code finally popped up with a p2723. 0 duramax while my truck was at the dealer for a month but I just can’t justify prices right now. All 6L80 questions answered by experts Mar 9, 2023 · Hi All, Since so many of us own at least one Tahoe or Yukon equipped with a 6L80, I figured I'd start an all-encompassing transmission thread with videos, links and other information as it relates to the 6L80/90 transmissions. Came in with shift solenoid codes and blown up torque converter. Once the TCC fails, it takes out the 6L80 with it, requiring a rebuild and a new torque converter. 0L doesn't have AFM & in turn doesn't slip the TCC at a constant albeit small RPM differential allowing the Converter to last longer. Product specifics: - TRG-6L8-CS-TCC Jan 31, 2021 · I have observed that my 2018 with the 6L80e is not locking up the torque converter clutch (TCC)as good as the 4L60e. We have seen this a lot where the blown up torque converter plugs the solenoid screens with metal, and then starts setting solenoid codes. The lock up cycling complaint is often due to the poor resolution (accuracy) of the original equipment TCC regulator valve Jan 19, 2024 · General Motors has published multiple technical service bulletins pertaining to torque converter clutch shudder issues in their 8-Speed transmissions. . May 31, 2023 · Hi All, I'm brand new here but active on other GM forums where the 6L transmissions are actively being discussed so figured I'd start a similar all-encompassing transmission thread with videos, links and other information as it relates to the 6L80/90 transmissions. Nov 8, 2019 · A lot of bad things can happen to your car when the torque converter starts failing. 15 sec. I'll get it going with a tear I just finished rebuilding my 6L80 after a converter failure tore up my old pump at ~130k. I'd do a full service on the tranny (fluid and filter) and check the pan for metal debris beyond the usual black filings. Googl TCC shudder is one of the most common problems with these transmissions, it would be nice to have some solid answers as to how we can raise the apply pressure with the parameters available. At low load, the TCC line pressure has a lower threshold, effectively the Apr 12, 2016 · At 168k trans let loose and had it rebuilt at a local trans shop with good rep. List of suspects: TCC solenoid (TEHCM) TCC regulator valve (lower valve body) TCC control valve (pump) TCC limit valve (pump) Torque Converter (clutch burnt up [shocker]) All of the above to varying degress. 6L80 TCC tuning help 2018 Silverado 5. You can also invite a friend. It can also be the TCC valve bore. Oct 24, 2010 · 6L80E with stall converters tcc fix V8 and V6 Transmissions / Driveline (6L80 / 6L50 / TR6060 / AY6) Jun 27, 2022 · General Motors has published multiple technical service bulletins pertaining to torque converter clutch shudder issues in their 8-speed transmissions. Unfortunately, this can lead people to think that they need to spend thousands of dollars to rebuild or replace their automatic transmission when the cost to replace a malfunctioning torque converter is considerably cheaper. But they aren’t without their problems though, so let’s look at some of the most common GMC K1500 transmission problems, look at cost estimates and figure out what you can do about them. I have a Century built A6 and Yank 3200 Stall, I suspect I have to increase pressures, just dont know what ones, any ideas? Attached Current tune file as well Cheerz Jun 3, 2019 · The GM 6L series units are quickly replacing the 4L60E as the most common unit shops find in their stalls today. Converter should be replaced before the material wipes out the pump. This is primarily TCC engaged in 5th gear (or possibly 6th) in the sub 2000 rpm range, with desired TCC slip of '0' (programmed not stock). Aug 22, 2018 · As some of you know, my 2011 LT 5. Find out how to fix these issues and upgrade for better performance. GM 6L80E/6L90E Transmission Problems And Performance Upgrades Offered By Gearstar Starting in the 2006 model year, General Motors released the 6L80E and 6L90E transmissions that developed several issues that tend to frustrate transmission as well as body shop technicians servicing them globally. i have 2010 silverado 6. Jun 3, 2020 · Sure does sound like the TCC. Jan 18, 2025 · 2020 Chevy Suburban w/ 110,000 miles Before tear down issues: progressive slipping/flares from drive. Jul 30, 2025 · Common 6L80E transmission problems like slipping, overheating, and solenoid failure. I can post files and logs when I get around my other computer later, but I have tried altering the TCC Desired Pressure, Apply Ramp, Max Pressure, Regulator Offset, Regulator Gain, etc with no change Featured Transmissions Ford 5R110 Torqshift Ford 4R70W/4R75W GM 6L80/90 Ford 6R60/75/80/100 Dodge/Chrysler/Jeep 62TE Dodge/RAM 68RFE ZF 8HP70 Value-Oriented Products & Superior Customer Service JASPER is committed to helping you succeed. I’m looking for a little advice. Figured then I would see a really firm lockup but instead I see TCC pressure as low as 20psi and some TCC slip while cruising in The 4WD GMC K1500 (hence the ‘K’ designation) was equipped with the 4L60E transmission, the 4L80E transmission, and the 6L80 transmission. A failing torque converter is one of the most common transmission problems we see. And obviously there is a reason that causes this to happen but is there an in depth reasoning as to why each problem Feb 11, 2025 · In 6L80, 6L90 units, an inherent torque converter problem might be the root cause of a lot of the transmission failures. A lot of updates have occurred to the parts to address the problems you may be experiencing. but will not actaully start its lockup until a varried amount of time later. I dont want to burn the lockup clutch up My tune file is attached. it started slipping from a dead stop. I got this software because of better support for this transmission. I keep getting P2160 code, indicating a "Vehicle Speed Sensor 'B' Feb 3, 2024 · I have a 2010 Camaro SS with 6L80E, I’m replacing the bad motor with a LS376/495 Chevy crate motor, which is a LS3 with the GM hot cam. The General Motors 6L80-E transmissions are among the most diverse and capable transmissions of their time; being used in everything from exciting muscle cars to family SUV’s. We are going to squeeze Jul 30, 2023 · Tcc slip look normal or is it on the way out? At times it feels like tiny surges of throttle around 70 or 80mph but it’s intermittently happening, gonna get better log tomorrow but figured a quick This is the only YouTube video I’ve ever made so don’t hate on my camera skills 😂I replaced the torque converter on my 2014 Silverado and cut open the old c 2006 and later General Motors and BMW vehicles equipped with 6L45, 6L50, 6L80 and 6L90 automatic transmissions often come in with complaints of lock-up cycling or a surging sensation, as well as shift solenoid or TFP performance codes due to sticking clutch select valves. Dec 19, 2013 · I recommend increasing the aggressiveness of the TCC Apply Ramp Pressure Adder vs Slip Error, Increasing Max TCC Pressure, And Zero'ing out ALL Desired TCC Slip Tables. Here's what I've learned. 3L, rebuilt 6L80 with new Precision HD (billet case) torque converter. I have now Jun 24, 2021 · With 6L80 transmissions having TCC issues, the TCC Reg valve in the valve body is usually looked at first. Apr 29, 2016 · Has anyone noticed a rash of failed 6L80 and 6L90 transmission? I was under the impression they were pretty solid units but now I’m not so sure. . Logs attached. But they aren’t without their problems though, so let’s look at some of the most common GMC Sierra 1500 transmission problems, look at cost estimates and figure out what you can do about them. Let the trans shop take it for a ride and command the TCC onIf the TCC command is able to be executed and TEHCM responds then the problem is in the VB, pump or so ive got a gen V truck 6l80e about done, and everything is about 98% tuned and working really well. when running on the highway it is so anoying and unefficent when starting up a hill at 70mph it comes out of lockup in 6th and reves over 3000rpm. Doesn't seem to happen in other gears. May 31, 2022 · This is another problem that is more on the complicated side and is best to let a mechanic take an in-depth look to verify the problem. The time now is 05:34 AM. This problem currently affects 11 different models across 3 different OEM brands for the model years between 2015 and 2022. Sep 24, 2023 · Yep, TCC Stuck off. The 6L80E TCC Wiring Diagram is a comprehensive guide to understanding the electrical components of the 6L80E TCC system. Apr 22, 2012 · The next step is to see if the problem is inside or outside the converter. The only changes from stock was Sonnax 4-5-6 apply upgrade, Raybestos frictions, changed from the 7 balls to 8 Feb 18, 2018 · 6L80 TCC lock up CLINBARGER HELP!!!!! Engine & Drivetrain Oct 16, 2022 · This GM 6l80 transmission had a slipping torque converter and lots of torque converter shudder along with metal in transmission pan. I have located this video of a trans shop in Australia that posted this FANTASTIC breakdown video of the 6L50E and showing what parts fail and why. 3/6L80e, not as slow but still heavy. Dealership never would change the filter so the first time it acted funny it actually sounded like a hydraulic pump starving for fluid. Used HP Tuners to disable TCC in gears 1-3, set 0 slip in 4 through 6, set TCC Regulator Offset to 90psi and gain to 1. Bore wear at the TCC regulator valve can cause no TCC apply or slipping on engagement, harsh shifts, loss of performance and fuel economy, and fluid overheat. These mods are considered to be must haves for Silverado transmission longevity. Like Let's talk about locking and unlocking the TCC (torque converter clutch). We’ll go through a few categories of the unit, and a variety of reasons Apr 8, 2025 · Ever noticed your GM truck shuddering when you accelerate? Or maybe it’s slamming into gear with enough force to spill your coffee? You’re dealing with a notorious issue in many GM vehicles. It Oct 19, 2023 · Okay, been reading here, found one thread that has a similar issue but didn't want to hijack, so here's what I have: 2015 GMC 6L80. Even changing the ATF every 35k miles only delays the TCC's eventual failure. It was slipping the 2-3 and 4-5 Shifts. Maybe one day, but for GM bulletins are intended for use by professional technicians, NOTa "do-it-yourselfer". An invitation will be emailed automatically when future webinars are scheduled. If you rebuilt it both times with a totally stock converter, then there is where your issue probably is. Airmass directly controls pressure. Feb 2, 2012 · Hello Guys! New to this board and just picked up HP to tune my 6L80E tcc. Oct 21, 2016 · Problems in other onboard computer systems can interfere with transmission operation. If it fails, not only will there be drivability issues. Jan 19, 2025 · The 6l80 was designed to handle the torque output of some of GM’s biggest late-model LS (gen 4) and LT (gen 5) v8 engines, but a number of design flaws created most of the common 6L80E transmission problems. Dec 14, 2024 · Hi all, as everyone knows GM has had a range of troublesome transmissions with problems that ranged from shuddering, slipping, hard shift, delayed shift, downshift bumps, etc. 5RPM desired slip instead of 0 as it should be. please see attached picture to understand where Im looking and Sep 17, 2021 · Sonnax valve body diagram for 6L45/50/80/90 units. Able to engage and drive after a period of cool down. Changing just the TC doesnt Feb 15, 2024 · Hi there, first post on the site. 3L 6L80. After that, there is the Lubegard 19610 additive that people swear by and that I have used for a slipping TCC in a 6L80. As Aug 21, 2013 · Sonnax TCC regulator valve kit 104740-46K restores proper valve function resulting in proper TCC apply. Sonnax has the answer. Didn’t make a lot of sense to just replace the torque converter on a trans with that many miles. The 6L80/90 is plagued by two major issues: A. Noticed predominantly after driving for a period of time and warmed up. Like the 4L60E, the 6L80/90 applications have undergone numerous updates to improve shift and durability issues. Looking forward to being a part of the forum!! I have a 2009 silverado 1500 Ltz that is having some transmission problems. The clutch is usually locked up as a percentage value, so it's normal for some slip. Jan 21, 2023 · For more context around 6L80 TC and related failures: The factory pump pressure regulator valve (pump cover) and TCC regulator valve (lower valve body) wears on the “balance spool” end of the valve allowing oil to bypass the valve sealing surface. I have felt it in 5th and 6th on this tranny but it is VERY soft, almost not noticeable. Dec 2, 2018 · Does anyone know a web page to find out which gears the TC in the 6l80/6l90 locks up? Most auto trans I have had in the past, you can feel the tranny lockup as it feels much like a shift itself. Also, this signal has little impact on the TCC. No codes at all are being thrown for the powertrain. all my commanded TCC slip numbers are at 0, and ive never had a problem one. Whenever I lift the throttle while cruising at say 50-60 mph, as soon as I press the gas, the TCC releases a bit to allow a certain clutch slip which shows as a sudden rpm rise then the TCC completely locks up until you coast again. I have tuned the TCC slip table to zero and disabled tcc adapt. Mar 31, 2018 · A common problem for many General Motors cars is when the Torque Converter Clutch (otherwise known as TCC) fails to release. Fix only the problem without addressing the root cause of that problem, and you can bet that the car will be back. If the engine stalls when the shifter is moved to any drive range, you know that the converter is working properly and the problem is outside the converter. This fixed some very bad torque converter 2016 Silverado CCSB 5. As the ATF ages the friction system can change over from positive mu-slip coefficient (inherently stable system) to a negative mu-slip coefficient (inherently unstable system) which ends up causing the shudder. It ended up being the torque converter coming apart, and the only sign when dropping the pan was a film of aluminum 'dust' at the rear of the deepest part of the pan. Verify the signal through your scanner. The 6l80 uses +12v to signal the brake switch. Find An Installer Become An Installer Find A Price (800) 827-7455 Additional Resources Warranties Video The General Motors 6L80-E & 6L90-E transmissions are among the most diverse and capable transmissions of their time; being used in everything from exciting muscle cars to family SUV’s. I have changed the settings to correct cruising issues with heavily modified vehicles but I have not seen any issues or benefits with stock. Mar 18, 2024 · 2018 Silverado 5. 140k-ish miles, 5. Become a 6L80-E and 6L90-E expert now! Jan 22, 2022 · Just had Torque Convertor Changed in My 6L80E to Avoid Future Problems (Hopefully). 2l camed withe a circle d 3200 rpm single disc converter. Keep reading to find out these common torque converter problems and how to fix them. It’s a 118K mile 2018 Jul 9, 2019 · Discussion: 6L80 lockup or non Lockup ??? Hello I have Discussion regarding for TCC lockup, what your suggestion for street racing ( not drag ) for the Tcc Lock up ? what did you feel your car its better if you lock up or non lockup the TCC ? My TC circle D 3200 please advice After studying the hydraulic diagram of this units I decided to try and make this modification to engage TCC as if it would be an on/off type of engagement. Here are several bad torque converter symptoms and signs to look out for. ), 2500 Billet Stall. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. I used a CDT level 2 rebuild kit, CTS-V 6L90 TC, zip kit, new pump cover and bell housing, etc. Apr 13, 2021 · The TCC solenoid is a switch to control the fluid pressure and release that locks up the torque converter clutch. Mar 27, 2025 · Attempting self-repair without adequate expertise can exacerbate problems and void warranties. com Mar 2, 2004 · I have a buddy that owns a 2014 GMC Sierra SLE w/ around 165K (5. No relay required. Here is the file Jan 2, 2025 · To be precise, the problem is the way GM tuned the 6L80's torque converter clutch to behave during lockup. I really debated trading up to a 3. 3L Gen 5 engine. I can give it just a slight amount of gas, enough to get the TCC to disengage, and the shudder goes away. Apr 7, 2010 · The Electronic pressure regulator (TCC PCS) is controlled by current flow to the solenoid to control apply and release. No files for this video, but here is the link in case you missed it previously. The trans was completely Get 6L80 transmission rebuilding tips, 6L80 troubleshooting help, 6L80 technical service bulletins, 6L80 diagnostics and 6L80 technical information from TRNW. Sep 4, 2020 · The 6L80E uses a sophisticated Torque Converter Clutch (TCC) system to provide smooth shifting between gears and reduce torque loss. 3/6L80 suddenly started occasionally 'bucking', just like a random misfire. Jun 13, 2017 · Here the situation: 2012 Caprice PPV L92 short block 6L80 trans BTR Stage 1 N/A cam Circle D 278mm 3000 stall HP converter CAI and axle back exhaust TCC disabled in 1-4 Apr 12, 2023 · Paid $93 for confirmation of problem to the only trans shop around me that was willing to do what I asked: confirm problem, if TC then replace TC, clean and inspect 6L80, add shift kit and add a few other upgrades I wanted in 6L80, and TUNE OUT the TCC lockup in the lower gears and raise the pressure when locking it. The 6-speed automatic transmission (particularly the 6L80/6L90 series) has developed quite a reputation among owners—and not the good kind. The torque converter (namely the plate the lock up clutch is bonded to inside of the converter) is prone to fail (lockup clutch plate flexes with heat cycles and miles…and creates fine metal shrapnel that is suspended in the fluid) and the fine metal shrapnel wipes out the transmission pump B. Apr 5, 2022 · DTCs P0562 Low voltage, P0742 TCC stuck on, P0776 Solenoid 2 stuck off, P0796 Solenoid 3 stuck off, P0965 Solenoid 2 performance, P0969 Solenoid 3 performance, P2714 Solenoid 3 stuck off, P2715 Solenoid 3 stuck on, P2719 Solenoid 3 performance and/or P2762 TCC solenoid performance. I also contacted Circle D for advice. This can be achieved by blocking the TCC control valve in the TCC apply position. *Open the TCC Apply Ramp table. Specifically, at high speeds on the highway or while towing. Then about 20k later I got rumble strip effect and they replaced the torque converter and did some more tuning Dec 21, 2024 · What is the TCC slip speed at max duty cycle when the converter is supposed to be "locked up". That's usually what goes bad first sending crap all thru the trans There are companies out there that build/rebuild converters with a better lock up clutch. Happens in second gear. except for one thing ive not had happen yet on others. Now I want to disable TCC lockup to eliminate this problem in future. Parish8, Look to see first if you have any misfires as this can cause the converter to unlock. I'll get it going with a tear down and inspection video and go from Dec 13, 2002 · I thought there were more problems than just AFM that causes the 6L80E converter failures, like that PWM should be disabled for the TCC apply and some other tuning is recommended because the default GM program on the transmission loves to slip the TCC and burn it up. So, let’s examine some conditions and causes along with a few diagnostic tips for troubleshooting. At 262k it's prob done (the converter clutch). I am trying to sort out what may be causing the issues before making a decision on what to do next. hpt Screenshot 2025-09-20 210549. Oct 13, 2023 · High outside temperatures Contaminated fluid (coolant, water, non-compatible additives) No TCC apply or excessive TCC slip External cooling system issues (sticking cooler bypass valve) In most cases, the transmission had enough metal that went through the unit due to the torque converter and pump failure to compromise the external cooling It is caused by the TCC engaging and disengaging improperly and is more noticeable in front-wheel-drive vehicles. Paid $93 for confirmation of problem to the only trans shop around me that was willing to do what I asked: confirm problem, if TC then replace TC, clean and inspect 6L80, add shift kit and add a few other upgrades I wanted in 6L80, and TUNE OUT the TCC lockup in the lower gears and raise the pressure when locking it. i cant get the thing to stay in lockup in 5th and 6th gear. What I did: the 6L80 in my truck was slipping and upon Inspection My zero slip TCC shifts like a dream, but it does have a billet case, not the stamped OEM, that may help too. The 6-speeds are based on how much slippeage the TCM sees, then tells the TCC PC Solenoid to apply the correct pressure to the lock up clutch. It's Mar 16, 2023 · I am certain that many have experienced a no-movement forward, no-reverse or abnormal pressure condition with a GM 6L series transmission, especially since they are one of the most popular unit families in shops today. Pan was pretty clean, fluid was never changed. 2018 silverado read 9-19-25. Learn how to diagnose it. I need to have the TCC lockup closer to the actual gear change. 2L, Whipple Supercharger, "Pterodactyl" 6L80E (Alto Clutches Welded shafts, etc. The *problem stems from the torque converter clutch constantly Hello! I need help with transmission of Suburban 2015 6L80E Transmission was rebuilded. Wire this directly to the brake light circuit. In this Drivetrain 101, we’ll analyze all of its most prolific problems, solutions and upgrades. After implementing several fluid revisions, GM’s latest solution (TSB 18-NA-355) is lengthy, complicated and expensive. Join us as tuning expert Tony Gonyon helps resolve a lot of common GM 6L80 Transmission tuning woes. Dec 19, 2013 · Then I can log TCC Slip RPM vs TCC Regulator Solenoid Duty Cycle to get an idea how the 2 TCC set-up's react to the same pressures. The tcc regulator valve and it's bore in the valve body is likely worn, same with the AFL valve bore. This is due to the way the powertrain and mounts are set up, which does not absorb See full list on transmissionrepaircostguide. Let’s break down what’s happening inside your Oct 23, 2023 · 6L80E/6L90E Torque Converter Questions Trans has been acting fine as far as I could tell, but I’m about to pull the motor to do an AFM delete (cylinder #1 exhaust lifter collapsed) so now would be the time to upgrade the converter before I have any issues down the road. If you look at a truck with the 6l80 you will notice that they With the TCC locked (5th or 6th), when you apply 20-30% throttle and the TCC remains locked, it will shudder like crazy. View recommended parts for quality repairs of common transmission problems quickly and easily. Pressure Controls — The 6l80/90E transmission hydraulic system uses a vane type pump to supply line and boost pressure to operate the transmission. Fits GM 6L45, 6L50, 6L80, 6L90 transmissions. Just put the 6l80 back together for my first rebuild. I have a 2010 GMC Sierra 4WD, 6. ie After the 2-3 shift, line pressure will max at 110 psi in about 0. Mar 31, 2020 · In 6L80, 6L90 units, an inherent torque converter problem might be the root cause of a lot of the transmission failures. Typically just cleaning the screen, and replacing the pressure switches will allow re-use of the solenoid pack without issue Nov 3, 2023 · This shudder problem is in the torque converter clutch (TCC) and shows up when the TCM is doing slip control on the TCC. May 18, 2017 · TCC slip is just the rpm difference between the engine side and the transmission side of the converter. Torque converter problems are sometimes misinterpreted as symptoms of a failing transmission. Vince has re-wrote the code for all us guys wanting WOT lockup on our triple disk, or even the guy just wanting the extra MPG gained from zero slip. 3. After rebuilding I reset adapts and tuned using Bluecat Trans tool and disabled TCC apply in 1-3. Jan 8, 2021 · It would certainly increase your chances, Now to be clear. I seem to be experiencing tcc slip that is causing RPMs to surge up and down. I have disabled DTC of Torque Converter Clutch, then Mar 14, 2023 · The torque converter clutch solenoid is a common part that fails within the automatic transmission. I finally pulled the trigger on a remanufactured transmission from GM with 151k on the odometer of my truck. Last week: Driving home, noticed my RPM's were higher than they should be at 45 mph, like 2200 or so. on my computer i am unable to see the slip speed under the transmission-torque converter-general which is where I see everyone finding it. 6L80E Regulator Valve Kit 2006 - 2022 Vehicles with listed GM transmissions may have a number of TCC apply problems. If this is OK, the decision must be made to inspect the TEHCM or pull the unit and look at the turbine shaft O-ring, the PR valve, the TCC control valve, and converter limit valve in the pump. This should eliminate any issues with fluid pressure. No TCC until 3rd gear. The magnet had Mar 9, 2009 · The TSB & new fluid are being discussed on many GM forumsas you've surmised it is a "new formula of Mobil 1 Synthetic LV ATF HP transmission fluid" to address the lingering shudder issues with the 8L45 & 8L90. If you can diagnose the tcc being the direct cause, trans has to come out. Dec 23, 2021 · Torque converter clutch: how it works, symptoms, & cost - Summit County Voice As a part of the converter, the torque converter clutch locks the engine and transmission, letting them rotate at the same pace This article says more. Use one of the quick links to take action today. The entire transmission could experience catastrophic internal damage I've got an O7 Escalade W/6l80e trans in it that we are working on. After implementing several fluid revisions, GM’s latest solution (TSB 18-NA-355) is lengthy, complicated, and expensive. Jan 7, 2024 · Discover common GM 6L80 transmission problems and their fixes in this comprehensive guide and learn how to address issues like TCC failures. If it's more than 10 rpm or so, the tcc is slipping. Transgo Clutch Select Valve and TCC regulator valve kit for the GM 6L80 and 6L90 automatic transmission. My 2014 6l80 4wd transmission went bad at 165,000 miles. The vibration starts mild, and can get worse. Hey Guys, One thing I'm still trying to remidy is a TCC Slip issue, if you look at the attached pic you can see at 60%+ throttle the TCC Slip (rpm) and Turbine RPM both are erratic while in 3rd gear, this isn't from tire slip. im trying to get it to just downshift to 5th and stay in May 11, 2016 · However, I've noticed that at low speed cruise (55 and below), when the torque converter clutch engages, there is a terrible shudder, basically it feels like driving in a rutted out dirt road. Tall56Dog Feb 16, 2025 The way I understand it, the stock settings are set at 10slip because the ECU wants to apply just enough pressure to keep the clutch engaged but not so much pressure that it takes a long time for the clutch to disengage when commanded. For all I know the 4L60E TMBX clutch will shudder like crazy when subjected to a 6L80E JMBX clutch control scheme or be an overall poor fit for the application. hi, looking for some help with my trans tune. I don't know what you know about HPtuners, So forgive the overly simplistic tutorial if you already know some of this. But after some time it has problems again, I was told by a transmission shop that the 6L80/90's wear the torque converter out pretty fast due to the amount of slipping they allow. Never had any problems with the transmission, it has 130,000 miles on it. Release the throttle and the TCC unlocks. HOW TO fix a Transmission Shudder on The 6l80 - 6l90 Torque converter (follow up GoPro) Chevrolet GM Codemans auto 117K subscribers Subscribe. Truck was tuned at a shop and they said it's all good it obviously feels wrong when you feel the RPMs surge, the truck almost bucks in the middle of a pull. It should also be noted that this is a temporary fix. Register for your time zone here. Left the dealer and all was fine. Remember to correct all existing codes in other modules before attempting to diagnose a transmission problem. If you don't post your tune and logs when you have questions you aren't helping yourself. The 6L80E converter has a very weak clutch. Jan 21, 2023 · I discovered this on my 2011 Yukon 6L80 awhile back and forgot to share it. 3L w/ 6L80E) that is experiencing pretty bad shudder at lower RPM under load when the torque converter clutch is engaged / locked. Oct 22, 2023 · Folks, Long but detailed post. This problem is typically related to mechanical issues within the torque converter, electrical faults in the TCC circuit, or problems with the transmission’s internal components. 0. One of the most common is the premature failure of the 6L80 torque converter. Stay updated with the Go Powertrain Blog — featuring expert tips, product insights, technical guides, and powertrain industry news for shops and installers. The desired TCC slip, is just the slip target that the trans is trying to achieve. I always run in M, so I can change The TCC shudder condition should be directional improved immediately after the fluid exchange procedure. He took it to a transmission shop that did 6l80 tcc problems 08 Denali truck yank converter, 230 cam longtubes, vvt delete. 97 In. It Oct 10, 2024 · Forum Tuning GM V8 Tuning GM V8 Tuning - Transmission 6L80 shift flares and TCC shudder Results 1 to 10 of 10 The 6L80E transmission is known to have its fair share of transmission problems. png This file is of my current 2018 Silverado and Im wanting to tune the 6l80 and want to mess with torque converter slip speed. Jan 21, 2014 · 6l80e lockup issues Tuning / Diagnostics -- engine and transmission Jan 18, 2018 · Recently I had the transmission in my 2011 Silverado go out. If a This video details a common issue with the 6L80E transmission, particularly in Chevrolet and GMC trucks with the 5. Pretty much a newbie with HP Tuners. I changed a 6L90 at my regular job (fleet of mostly Express 3500 vans) in a 2016 Express with just under 130,000 miles on it. How Transmission Remanufacturers Address GM 6L80 Issues During The Rebuild Process Some of the problematic parts of the 6L80 are replaced or upgraded by transmission manufacturers. It was still moving in forward and reverse when it was towed to a local reputable transmission specialist. I took the problem head on, and decided to swap the trans myself and deal with the programming myself. What Are The Flaws Of The 6L80E/6L90E? The 6L80 transmission, while robust, has reported issues such as: Torque Converter Failures: Problems with the torque converter clutch can lead to shuddering during acceleration. This problem currently affects 11 different models across 3 different OEM brands for the model years between 2015 and 2019. -Lbs. It may take up to 320 km (200 mi) for the TCC shudder condition to be eliminated. Mar 15, 2025 · I've been having all sorts of crazy shift pattern problems with my new 6L80e transmission. The Torque Converter filled the trans up with small sparkly metal pieces and gouged out the pump and bell housing along with 4-5-6 clutch pack being burned to the extent of no friction material left. If you're having shifting problems - up and down shifting a lot - usually goes along with this problem - then you can edit the map models. Become a 6L80-E transmission expert now! Feb 26, 2025 · Discover common GM 6l80 Transmission Problems and learn expert solutions for issues like harsh shifting, delayed engagement, and slipping gears in this comprehensive guide. Aug 1, 2024 · Alright yea its another thread about the 6L50E shudder. Unlike the previous 4Lxx transmissions. Nov 2, 2017 · TCC shudder / tuning solution TransmissionsAll times are GMT -5. Nov 14, 2020 · The 6L80E torque converter in my 2014 started letting go after ~146k, about 2k after the 3rd fluid change. Dec 2, 2021 · Realizing this as a fix, we must also note that the 6L80 and 6L90 applications use the same motor mounts and similar torque converter clutch scheduling strategies. He'll discuss Torque Management, eliminating Torque Conv Fix it before this happens!!! Learn the common FAILURES in your 6l80e transmission It’s a terrible thing, but happens a lot. I have watched lots of youtube videos and reading and went with this approach - no TCC in 1 through 3, 0 slip TCC in 4 through 6. Setting the desired TCC slip to 0, reduces the actual slip which theoretically leads to less wear on the clutch. 6L80/6L90 Delayed Engagement, Slip, Shudder, Clutch Damage Concern: Several customer symptoms may be present depending on where the leak is present, these include; May 5, 2025 · Tuning 6L80 Convertor with HPTuners 6l80 hp tuners torque converter transmission tuning transmission work/upgrades Jump to Latest 12K views 9 replies 6 participants last post by Someguy1313 May 5, 2025 May 31, 2017 · The key to repairing any problem successfully is twofold: You need to address the problem and the cause. Apr 27, 2015 · TCC slip Hello all, I just had a Hughes 245mm 3000 stall lockup converter installed in my G8. I'm Mar 8, 2023 · Learn common causes and diagnostic repair tips for 6L45, 6L50, 6L80, 6L90 transmission problems like no Forward, no Reverse and the abnormal pressure condition. I also added 10% to the TCC apply ramp. I have a new deeper Moroso pan, and a Feb 22, 2015 · This is incorrect. Increase the lock pressure. Mar 4, 2022 · Wear or damage to the pump and cover are generally due to internal converter issues such as extensive friction disc wear leading to metal-to-metal contact between the TCC pressure plate and the converter cover or spline damage to the stator one way clutch outer race bore. 7 diff gears problem 2008 GMC Sierra trans question New A6 Parameters what is the power limit to an auto vxr8 T42 / T43 DVT files Mar 6, 2020 · Unit Endplays* Pump Body to Converter Housing . Transmission is rebuilt, and new Precision of New Hampton HD (billet) converter. It is still required. The solenoid valve controls the fluid pressure of the hydraulic transmission, which enters the lock-up clutch. The solenoid takes the ECM’s instructions, opening or closing to control the amount of fluid going to the TCC. Sep 25, 2019 · General Motors is facing lawsuits over defects in the 8-speed GM transmission, with one lawsuit alleging GM knew about the problems as far back as 2014. 10 - 0. The 6 speeds dont have the Max/Min tables like the 4-Speeds which are controled by a % and TPS. I have the "other" tuning software also. Your 6. I am having problems with p0700 and p0741 and the converter clutch will not lock up. I have been increasing converter lockup ramp and the offset (125 psi). This vital doughnut shaped component is responsible for transmitting power from the engine to the transmission. All other frictions were good. but on this one, when the converter locks, everything works as intended except im logging 4. They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Lost all gears, including The GMC Sierra 1500 was equipped with the 4L60E in early models, and 6-speed 6L80 in later models and 8-speed 8L90 in 2015+ models. Dec 3, 2018 · Diagnosing TCC issues in a GM lock-up problem can be difficult, but using step-by-step troubleshooting methods can make it possible to figure out. Afterwards there was some hard jerking decelerating, I took it back they did some tune and it was good. And with the mileage on 6l80/6l90 transmission problems solenoid problems solved life with Derrick 386 subscribers Subscribe Nov 12, 2023 · The code P0741: Torque Converter Clutch Circuit Performance or Stuck Off indicates a performance issue or a stuck-off condition in the Torque Converter Clutch Circuit. The same week, in my Aug 29, 2010 · Anyone running the 6L80E transmission now has the availability of full lockup at any speed/psi (tranny integrity limiting). The TCC PCS requlates actuator feed limit fluid pressure to the TCC requlator valve, located in the lower valve body and provides a signal pressure to shift the TCC control valve, located in the pump to the apply position. The problem im having is when I apply moderate throttle, the lockup slips a little bit and then locks good. What do we mean by “addressing the root cause”? Let’s take a look at a 6L80 with a no high gear and no lockup. i must be missing Aug 23, 2018 · What I have problems with is when making full throttle hits going through the shifts. No luck with any cheap fixes. If the valve is stuck in the apply position, the result is harsh TCC Need help with 6L80E/T43 tune Torque reduction 2009 OS support A6 with 3. Hope everyone enjoys thanks f Jan 25, 2021 · P0741 Torque Converter Clutch Solenoid Stuck Off P0700 Transmission Control System (MIL Request) Took it to the dealer where they replaced they tested the line pressures per Service Bulletin 19NA153 (pressures were within spec - 80-300 psi), replaced the TC, inspected the module, and replaced the filter. The nearest transmission shop to me How to convert the TCC in a GM 6l80 from a constant-slip PWM-regulated clutch to a simple old-school on/off clutch. ghsye wgmbkquf syymr qiqnu rdgkilxe gwuiqm pgvk nthzsh phkxfhq abdg