6l90 delay in forward. Here's what happened.

6l90 delay in forward Currently no codes and no CEL. Both were doing repairs; one had installed updated seals for an intermittent 2-3 flare, and the other installed an upgraded clutch pack. Once hope, I reset the engine light, and once again had no forward gears. i went for it pulled the valve body and found the check ball Jul 1, 2018 · 6l80/6l90 reverse and 3rd and 5th gear problem. Just started, it works in reverse and low. TSB 08-07-30-015 – Chevrolet Express 3500 4L80E Problem – Harsh shifts, delayed 2-3 shifts, 2-3 shift flare, no 3rd gear, slips in 3rd gear or reverse Problem – Harsh or delayed shifts, slipping, no forward/reverse gears. Shifting delays are normal in extreme temperature changes, especially bitter cold temperatures. They are written to inform these Aug 30, 2023 · You could have a 6L80, 6L90 or Allison LCT1000 or 2500 but not 100 pct sure unless you take a look underneath or check the RPO codes MYC (6L80) or MYD (6L90) or Allison 1000: MBV - TRANSMISSION AUTO 6 SPD, ALLISON, 1000, CONV CLUTCH, WITH PARK PAWL MBW - TRANSMISSION AUTO 6 SPD, ALLISON, 1000EVS, CONV CLUTCH WITH PARK PAWL Dec 30, 2020 · The complaint A GM truck equipped with the Allison 1000 transmission has a complaint of slipping badly in drive or no forward movement. Related Articles – Allison 1000: No forward movement – Ford 8F series identification guide – Are you maximizing your scan 6L80/6L90 Slips During Launch, Delay into D or Clunk at Engagement This bulletin applies to the following vehicles. What You Should Know about Transmission Delays. It drove fine for about a week, then the symptoms returned. The truck was equipped with a 6. Nov 14, 2016 · 6L80, 6L90; Dodge-Cummins Diesel; Powerglide; TH400; Delayed Forward; Forward clutch failure; Line Pressure Booster Kit 4R70W-LB1. Problem is, when I put it in reverse, it goes forward. Become a 6L80-E and 6L90-E expert now! Jan 25, 2023 · Hey everyone, got another problem with my 6L80. Once the learn process has finished it will shift into 6th, then out and back into 6th. Jun 3, 2020 · 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. Related Articles – Company Profile: Freudenberg-NOK is growing its products and markets – Performance supplier listings 2025 – Ford 8F series identification guide When What is the difference between the 6L80-E and 6L90-E transmission? The 6L90 is the slightly larger brother to the 6L80-E transmission, designed to capacitate the additional torque to the other unit. GM has recognized this concern and responded with updated slide and rotor kits. In this video, we cover the basic procedure for the reset of the trans. Solution – Rebuild or replace the valve body. As it warms towards operating temperature, the engagement problems diminish and are gone until the next cool-down period. In this Drivetrain 101, we’ll analyze all of its most prolific problems, solutions and upgrades. The hydraulic system primarily consists of a vane-type pump, two control valve bodies, a converter housing, and a case. 3 hr *This is a unique Labor Operation for Bulletin use only. Possible DTC Mar 21, 2023 · If delayed engagement is not the correct term. Hopefully this will help some people that may experience this sudden loss of drive in their GM pickemup. The **problem stems from Apr 15, 2016 · Quite a car. After ~5minutes of this, it finally threw a code and went into limp mode. Jun 19, 2019 · I'm finishing up a L92 and 6L80E swap in my buggy, and prepping for a shakedown run. Equipped with 6L80 or 6L90 Automatic Transmission (RPOs MYC, MYD) This bulletin has been revised to update the 2006-2009 Vehicles correction section and update the Labor Operation to the Global Labor Code (GLC). Replacing transmission components will not correct the condition. Includes: Precision ground drop-in steel pressure regulator valve, spring and spring seat Does my Truck have a 6L90? Yes, if you have one of the following. Does anybody have any idea what it May 26, 2020 · It's fixed. When it locks, following an unlock, there is a noticeable lurching forward. like all trans, service them often. com Jan 24, 2017 · I have a 2008 GMC Sierra 2500HD 6. No slipping, or weird noises, and no problem in any other gear. I get no errors on my scan tool, I have no forward gears at all. I can do a relearn and it will initially shift fine then progressively go back to the shift in, out, in of 6th. Please discard Corporate Bulletin Number 09-07-30-004I. • Damage to any or all of the following clutches; 1234,456,35R. never even seen the inside of a auto trans before . Possible DTCs: P0741, P0742, P0751, P0752, P0756, P0757, P0894. It's our houses third vehicle, doesn't get driven much (today was my monthly happy to drive the full size to work day) and has shuddered and lurched small amounts in the past but this showed up with no warning. Possible DTCs include P0776, P2715 or P2723. Shortly after the transmission has begun to develop forward and reverse engagement problems when the transmission is cold. 6 L8T (6L90), 2020-present Chevrolet Suburban 2500 (6L90), 2008-2013 Oct 31, 2015 · Have a 2011 6l80 with 179k. This lurching motion also occurs when upshifting 4/5 or 5/6, I think; not 100% sure. Here's what happened. New Boost Bushing 3/16 in. I found this out as the trans started slipping. They both had the same question: what would cause a "no-move" Forward or Reverse after the rebuild? Oct 18, 2024 · Delayed Transmission Engagement. When I removed the trans I noticed the electrical connector was FULL of fluid. Possible DTC 0757. If you tow/haul frequently, or nee This webinar was presented on 7/25/17. Once you start to try to go, there is a delay in it actually grabbing/engaging. TSB 08-07-30-015 – 4L80E Transmission Problem – Harsh shifts, delayed 2-3 shifts, 2-3 shift flare, no 3rd gear, slips in 3rd gear or reverse. No Reverse : Difficulty engaging reverse gear could point to issues with the solenoid, valve body, or a faulty torque converter. Apr 17, 2022 · The Problem of having “Delayed Forward and Delayed Reverse” in the 6L80 Transmissions may NOT just be a Problem with Malfunctioning TEHCM Switches, but may also involve LEAKS from Damaged Switch Films. 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. Both were doing repairs: one had installed updated seals for an intermittent 2-3 flare, while the other installed an upgraded clutch pack. Feb 20, 2023 · Buy Shift Kit 6L80 6L80E 6L90 6L90E 2006-On SK 6L80: Shift Kits - Amazon. Solution: Rebuild or replace the valve body. 3L Gen 5 engine. Subsequent 1-2 shifts have acceptable shift feel. I have a 2007 GMC 2500hd new body style, 6. It was rebuilt after the TC went out and ran fine for 750-1000 miles or so. Then engine revs up and it doesnt go forward. Verified it did have transmission fluid leak but not substantial enough to loss Jan 14, 2021 · The 6L80 and 6L90 transmissions have become the most popular rear-wheel drive GM transmissions in most of our shops. 0, 6L90 transmission wont go in reverse after warms up and delays in forward gears - Chevrolet 2007 Silverado 3500HD question Search Fixya Press enter to search. GM 6L80 and 6L90 transmissions often suffer failure of the 4-5-6 clutch assembly due to OE design shortcomings. However, there are still some 6L90 versions without the extra plate to match certain applications when needed. the 6l80/90 can be a nice feeling trans at times. Problem – Vehicles equipped with the 6L80 or 6L90 transmission may slip when Reverse is selected or have no/delayed reverse engagement, harsh shifts from 2-3 / 4-5 or slips while in fifth, and slipping acceleration when passing. Nov 1, 2013 · Cause # 2: When the transmission was disassembled, the input carrier was found to be installed upside down onto the 1-2-3-4/3-5 Reverse Housing. air check of trans that drove out perfect. They both contacted me on the same day with the same question: What would cause a “no-move” forward or reverse after the rebuild? 6L80/6L90 Delayed Engagement, Slip, Shudder, Clutch Damage Concern: Several customer symptoms may be present depending on where the leak is present, these include; • Delayed Drive and/or Reverse engagement, shudder or slip on acceleration or on a shift, hard 2-3 shift hot. The 6L90 transmission case is 1-3/8” longer, which provides extra room to house two additional pinion gears (6 total). If the vehicle has reached normal operating temperature after a rebuild and still exhibiting delayed engagement in forward, reverse or both, the TCM case could be warped. P-park R-Forward N-Forward D-Forward M-Forward I recently dropped and replaced the valve body to remove the TCM. Other than that's Dec 28, 2014 · Delay in Reverse 2010 camaro, trying to get a little insight before i get a hold of owner says trans drive perfect and all shifting ok except when in park goes to reverse their is a delay in reverse and slight clunk then move, any insight ? would a fast learn help i believe he said trans had been build couple month ago ? thanks I do not have Sep 5, 2019 · I proceeded to rev it forward, then into reverse, rev it forward, then into reverse. These 6L90 transmission upgrades made the 6L90 stronger, allowing it to be called a heavy-duty 6L80. It does it when it warms up and when I come to a stop. Now here is the problem - I reinstalled the trans and filled it full of fluid, 12 qts. Feb 2, 2021 · Customer complaint was delay engagement in the transmission on cold morning. See full list on transmissiondigest. 0 (6L90), 2007-2014 Chevrolet Silverado 2500HD/3500 HD 6. Feb 12, 2022 · For the last year or so I have noticed that the torque converter unlocks and locks frequently at freeway speeds. Foot is HELD on Brake during maneuver. TSB 08-07-30-015 – 2002-2007 GMC Sierra 4L80E Problem – Harsh shifts, delayed 2-3 shifts, 2-3 shift flare, no 3rd gear, slips in 3rd gear or reverse Delay or delay-bang forward, as well as delay reverse engagements; Product Highlight: GM 6L45, 6L50, 6L80, 6L90 Shift Kit. Feels like clutch slipping and then grabbing once the RPMs are high enough. No leaks 69k miles. i started researching this issue watched allot of vids and finally pulled the pan just to have a look to see if i might be able to do it . You might notice this delay in both drive and reverse gears. Oct 21, 2016 · The 6L80/90E transmission consists of five clutch sets (1234, 35R, 456, 26 and LR), a planetary set, and a low clutch sprag, which provides six forward gears and reverse. Clutch backing plate specifications were also outlined. com FREE DELIVERY possible on eligible purchases Delay or delay-bang forward, as well as Oct 7, 2015 · Over the past few months i've noticed a more obvious slip while shifting from 2nd to 3rd gear. 0-liter engine and 6L90 transmission. First issue, when running for <10 minutes, the TC will try to lock at 55mph+ and do an erratic lock-unlock fit a couple times, then stay unlocked for another couple minutes. Chevrolet Express 2500-3500 (6L90-E), 2010-present Chevrolet Silverado 2500HD/3500 HD 6. Jun 3, 2019 · The back of the stator support houses sealing rings, which seal the feed oil circuits for the 35R and 1234 clutches. 3. 0 6L90E I believe, I have opened the valve body and replaced the valve balls. The 6L90 also features some enhancements in its hardware compared to the 6L80. TSB 08-07-30-015 – 2002-2007 GMC Sierra 2500 HD 4L80E Problem – Harsh shifts, delayed 2-3 shifts, 2-3 shift flare, no 3rd gear, slips in 3rd gear or reverse Mar 1, 2014 · A 2006 Chevy 2500 truck rolled into the shop with a complaint of a reverse delay, but mainly after the vehicle warmed up a bit. Generally, the customer would complain about a delayed or slipping engagement, usually going into reverse. Nov 15, 2013 · 2007 chevy 2500hd 6. On several occasions yesterday in drive and reverse, it seems like it engaged normally in idle. TSB 08-07-30-015 – Chevrolet Silverado 3500 4L80E Problem: Harsh shifts, delayed 2-3 shifts, 2-3 shift flare, no 3rd gear, slips in 3rd gear or reverse. Some key updates include: - For the 6L50, an updated TCC calibration was released to address booming and vibration. Some of these issues include slipping in third or reverse, harsh 2-3, 4-5 shifts, and/or delayed engagement of reverse or drive. Delayed engagement happens when there is a pause before the vehicle moves forward or backward after shifting into gear. 2500hd. I've noticed this at varying temperature ranges with the truck. We have seen several patterned failures, written numerous articles, and found countless fixes to keep these units on the road (and the list doesn’t end). Delay or delay-bang forward, as well as delay reverse engagements; Problem – Vehicles equipped with the 6L80 or 6L90 transmission may slip when Reverse is selected or have no/delayed reverse engagement, harsh shifts from 2-3 / 4-5 or slips while in fifth, and slipping acceleration when passing. But it’s 6L80 & 6L90 transmission have some serious problems that will prevent it from doing any work in all. Reverse delayed engagement 6l80. Early units had issues with the ring design, which lead to leaks, especially during cold operation. 1 ZF6 without 053 separator plate, plus 6R60, 6R75 and ’09–’14 6R80. Sent it back Mar 1, 2019 · Replace 3-5-R/4-5-6 clutch housing, retaining snap ring and backing plate with the updated second design level parts which comes in a kit (Figure 6). 2017 chevy 2500 hd 6. pullup select - On/Off Gears Magazine - The Source for Transmission Industry Know How May 31, 2022 · On the back of the stator support, there are seal rings. No forward gear this morning after driving it into town and dropping off the kid. 3 turbo engine and the 10R60 transmission built on or before May 19, 2020 may have a complaint of a harsh 7-6 downshift. This video details a common issue with the 6L80E transmission, particularly in Chevrolet and GMC trucks with the 5. 0 6speed trans no forward gears. The units that came out earlier had issues with the ring’s design, resulting in leaks mostly during cold operation. If you notice the delay is absent in warmer temperatures, there’s no need to worry. Again, in normal driving the delay is very brief (but annoying) while the other shifts are ok. com/yamx786b Jul 12, 2020 · We have received many calls as of late for abnormal shifting on 6-speed transmissions. The result was mostly a slipping or delayed engagement that went into reverse. Condition Some customers may comment on any of the following conditions: Sep 23, 2014 · What they have in common is working on the 6L80/6L90 for the first time. While no movement can Transgo 6L80/6L90 SHIFT KIT SK 6L80 Fits 2006-2018 6L45, 6L50, 6L80, 6L90 Features and benefits: Erratic shiftsDelay or delay-bang forward, Nov 8, 2022 · This will result in 1-2-3-4 application problems. The link to the handout material: https://tinyurl. throttle occured IOD port A: Glow plug relay - Closed/Open • Stepper motor inhibit - Run/Inhibit Service Throttle Lamp - On/Off EGR vent enable - On/Off • Shift A - On/Off Shift B - On/Off TCC enable - On/Off (4L60E only) • Force Motor enable - On/Off IOD SOD status register: Coolant temp. Replace the 3-5-Reverse clutch apply piston that has no notches and the updated 3-5-Reverse waved plate that is stress relieved; it is darker in color than the first design waved plate (Figure 6). Problem: Harsh or delayed shifts, slipping, no forward/reverse gears. Main Pressure Regulator Valve The 6L80 (RPO MYC), 6L90 (RPO MYD) may exhibit any of the following symptoms: • No forward or slips when moving forward • Neutrals on the 1-2 shift, then the transmission goes into 2nd gear • Possible P0756 may be set • The conditions may be intermittent in nature and may or may not have developed after a repair. I understand that this is not always the case but it Feb 3, 2024 · Delay or delay-bang forward, as well as delay reverse engagements Sonnax Zip Kit 6L45-6L90-ZIP targets the root cause of multiple complaints by sealing the support to correct a delayed engagement condition. This condition may be present in more than one forward gear or if the condition is bad enough, it may result in a no movement forward condition. It will usually jump about 500 - 700 rpm when this happens but the other day it jumped almost 2000 rpm then shifted to third. Cold, reverse apply seemed to be okay. In this video, i go over 2 very common problems with the 6L80E that would cause no forward movement. Version 1 Modified Released May 14, 2020 GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". The trans fluid is good. 2) exceeds 3 seconds. Patent Pending ® Fits: 2006-2020 6L45 thru 6L90 Legs Step 1 Plain Cotter Pin Assemble EPC Relief 3/16” ball & Plain Spring into New Bushing & Spread the Cotter Pin legs. Product specifics: Brand: - TRG-SK6L80 Delay or delay-bang forward, as well as This TransGo 6L80 SHIFT KIT® Valve Body Repair Kit fits 2006 and later General Motors and BMW vehicles equipped with the popular 6L45, 6L50, 6L80 and 6L90 Problem – Harsh or delayed shifts, slipping, no forward/reverse gears. It just wont last as long, but then again, it wasnt part of a 10k upgrade package . truth be told, i was always more worried about being good to my allison than i am the 6l80 presently. 2013-2015 Escalade, 2013 Avalanche, 2013-2014 Caprice/Silverado, 2014 SS, 2013-2015 Suburban/Tahoe, 2013-2014 Sierra all equipped with the 6L80-6L90 MYC transmission and built in Silao Mexico. I fix the line again everything i thought was good and the trans had no reverse. May 25, 2014 · 6L80-E Transmission - No Forward - No Trouble Codes - Transmission Repair Sep 20, 2021 · Fixes the ring leaks that can cause 3rd & 5th ratio codes, delay or delay-bang forward or reverse engagements. Correction Important: Replacing transmission components or complete assemblies will not improve the condition. In addition, all other gears were fine and there were no trouble codes set. Sep 22, 2023 · the 6l90 and the allison are vastly different units. This is a disassembly or a tear down of a 6L90 automatic transmission for a no movement condition in forward as well as reverse range. This issue makes it seem like the car is hesitating before responding to your commands. Reprogramming Kit. The measurement should never exceed past . Filter and fluid I'm sorry for the delay you've experienced, I've just come Oct 11, 2024 · The 6L90 is an upgraded version of the 6L80 and is designed to handle even more power and torque. Car pan and Filter. Mar 16, 2025 · Delay is in progress Min. The Hydra-Matic 6L90 (production code MYD) is a six-speed automatic transmission produced by General Motors for use in rear- and rear-biased all-wheel-drive vehicles with a longitudinal powertrain Page 2 November, 2019 Bulletin No. These cover the feed oil circuits for the 3-5-R and 1-2-3-4 clutches. 4606651 If the customer describes the condition as a delayed or slow engagement time with or without a harsh or bump Sep 14, 2014 · All forward and reverse gears work and shift firmly (not hard, but not unnoticeable, clean and firm is the most apt description). TransGo Shift Kit vs. Code was P2723 (Pressure Control Solenoid E Performance Or Stuck Off) I was then able to drive it home in 3rd gear. So Replacing TEHCM may NOT actually be Necessary! Part 1: The Basics of the TEHCM Switch Film Problems: 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. Nov 17, 2023 · I do have the repair manual for this specific transmission and purchased all the specials tools or made my own to do the rebuild. Let me explain before you get upset and rip this page out of the magazine. The 6L90 also had more clutch plates, as an extra clutch plate was added to each clutch. Apr 21, 2019 · I've worked on cars since i was a kid but automatic transmissions are way above my skillset . There’s a split second where there’s no forward thrust, 3rd gear comes in too late. It has a higher torque capacity of 690 lb-ft, making it well-suited for heavier vehicles. If you have a GM Truck or Van with a 6-speed transmission, built after 2006, these issues are likely to affect your truck. First is a shrunk down #1 checkball and the 2nd is a cra Problem – Harsh or delayed shifts, slipping, no forward/reverse gears. 1) and Transmission Input Shaft Speed reaching 0 RPMs (Pt. Out of nowhere. TSB 08-07-30-015 – Chevrolet Express 4500 4L80E Problem – Harsh shifts, delayed 2-3 shifts, 2-3 shift flare, no 3rd gear, slips in 3rd gear or reverse Aug 7, 2024 · Delayed or Harsh Shifts: Hard or delayed shifting, particularly into 3rd or 5th gear, can be a sign of low fluid pressure, faulty solenoids, or valve body wear. Watch this video and learn about the common issues with this transmission. Delay or delay-bang forward, as well as delay reverse engagements Extreme pressure damage Damaged pressure switches Codes: P0729, P0731, P0732, P0733, P0734, P0735, P0751, P0752, P0756, P0757, P0761, P0762, P0776 and P0777 . Feb 2, 2014 · Hi all, New to the site, and hoping somebody can help me. 002” across the rotor or . Aug 6, 2024 · If check ball #1 (Figures 1 and 2) is having issues, the 6L45 (RPO MYA), 6L50 (RPO MYB), 6L80 (RPO MYC), 6L90 (RPO MYD) may exhibit any of the following symptoms: No forward or slips when moving forward or falls out of gear (neutral) during operation when the transmission is cold while in first gear. Avoid revving your engine during shift delays. 2011 2500HD. Jan 20, 2006 · Subject: 6L80 Automatic Transmission Delayed Engagement From PARK to DRIVE or PARK to REVERSE (Reprogram Transmission Control Module (TCM)) Model(s): 2006 Chevrolet Corvette with Transmission – Auto 6 Spd, HMD, 6L80 (RPO MYC) Condition Some customers may comment on a delayed engagement into Drive or Reverse when shifting from Park. Jul 15, 2014 · Fits Gen. 0 and when I shift into reverse it has a delay of about 10 seconds. The truck was still driveable going forward so i got it back to the house fixed the problem with a coupler still no reverse. I get a delayed engagement of reverse. With so many of them in need of repair, they have Aug 17, 2023 · A quick video on 3-5-R clutch failure and to demonstrate air check procedures to confirm or deny the drum's base welds are responsible for burn-up of the 3-5 8480988* Reverse to Drive Delay Verification 0. This is not neck snapping but is definitely noticeable. Temperatures can affect shifting. This document summarizes updates made to the 6L50, 6L80, and 6L90 transmissions. Randomly slammed out of 4th, wouldn't upshift, and eventually I lost all gears. Then blew the line off. Only annoyance is the automatic transmission, I think it’s a 6L90? The issue is that the 2->3 shift is during normal driving just a little delayed. Problem – Harsh or delayed shifts, slipping, no forward/reverse gears. I have a 2010 Chevy 2500hd with a recent reman 6l90 transmission after which the TCM was reprogrammed to the latest GM program. TSB 08-07-30-015 – 2002-2007 GMC Sierra 3500 HD 4L80E Problem – Harsh shifts, delayed 2-3 shifts, 2-3 shift flare, no 3rd gear, slips in 3rd gear or reverse Problem – Harsh or delayed shifts, slipping, no forward/reverse gears. Ball The 2007 – 2008 Chevrolet Silverado 2500 HD is designed to tow and haul just about anything. Apr 5, 2022 · In simple terms, the 6L50, 6L80, 6L90, 6T70, 6T75, 6T80 all use the same design TEHCM. The TEHCMs for all applications use different part numbers, which means they may not be interchanged with another part number, but all of the TEHCMs are manufactured by Bosch for GM. Dec 15, 2022 · The complaint Some 2020 Ford Explorers and Lincoln Aviators equipped with the 2. Delayed Engagement Park to Reverse or Drive is present if the time difference between Gear Selected (Pt. : 16-NA-019 To complete the Transmission Service Fast Learn procedure, enter GDS2 Diagnosis and navigate to: • Module diagnostics Home Transgo SK 6L80 Shift Kit Fits GMC Chevy Cadillac 6L45 6L50, 6L80, 6L90 2006-on. 6L90 are quickly becoming the transmission of choice for many GM vehicles. 0015” across the slide. Oct 1, 2012 · Related Articles – Step by step: How to test unfamiliar diagnostic codes – Inside the Audi DL382 dual clutch transmission – Identifying Chrysler RFE solenoid changes through the years Models 2006-2015 GM Passenger Cars and Trucks equipped with 6L80 or 6L90 Automatic Problem – Vehicles equipped with the 6L80 or 6L90 transmission may slip when Reverse is selected or have no/delayed reverse engagement, harsh shifts from 2-3 / 4-5 or slips while in fifth, and slipping acceleration when passing. Have done nothing What is the difference between 6L80 and 6L90 transmission? The main difference between the 6L80 transmission and 6L90 transmission is the strength of the internal components. Truck is Dec 17, 2021 · The complaint A 2015 Ford F250 equipped with the 6R140W transmission has just been overhauled. 0 (6L90), 2015-2019 Chevrolet Silverado 2500HD/3500 HD 6. Not enough clutches and insufficient clutch piston-to-plate apply surface area causes clutch plate failure, especially when apply pressures exceed OE specifications. If the Dec 4, 2021 · Shifted great after the temporary fix. There is no problem with reverse. Again, if someone else built this before you, just because it looks good does not mean it is good! Apr 1, 2011 · What they have in common is working on the 6L80/6L90 for the first time. With the advent of new vehicles with greater performance needs, the 6L90 transmission came at a very critical time. This is most likely to occur under light throttle conditions. CONCERN: 6L80/6L90 (RPO MYC, MYD) applications built before June of 2010 may exhibit a slip condition related to the operation of the 1-2-3-4 clutch. However, filter quality may not be the underlying issue. As the replacement for the 4L60E/4L80E transmissions, the 6L80 and 6L90 are used in many GM applications, including: • Cadillac STS-V, XLR-V, Escalade, Escalade ESV, Escalade EXT, and XLR • GMC Sierra, Sierra Denali, Yukon Denali, Yukon XL Denali, Apr 17, 2016 · When a GM 6L80/90 transmission finds its way into your shop with a complaint of no forward or reverse movement, or is slipping badly in all ranges, initial inspection may reveal a cracked or split sump filter (see Figure 1). Oct 13, 2023 · If the unit had low-pressure issues, delayed engagements, especially when hot, or a ‘shaky’ needle when observing line pressure on a gauge at idle, there might be issues here. TRANSMISSION IN MY 2500 HD, 6L90 is slipping. - For AWD applications using the 6L45/50, updated output shafts and transfer case input shafts were introduced to address grinding noises and Problem – Harsh or delayed shifts, slipping, no forward/reverse gears. The 6L80E transmission is prone to issues that include: 2-3 harsh or delayed shifts, harsh or delayed shifts from park or reverse, burnt 1-2-3-4, or 3-5 reverse clutch, check engine light (DTC P0751 Code), converter shudder due to flaking of the converter lining, shudder on low/reverse apply Subject: Slips in Reverse or Third, Delayed Reverse or Drive Engagement, DTC P0776, P2715, P2723, Harsh 2-3 Shifts (Inspect 1-2-3-4 / 3-5-R Housing and Pump Seal Rings) Models: 2006-2009 Cadillac STS-V, XLR, XLR-V 2007-2008 Cadillac Escalade, Escalade ESV, Escalade EXT, XLR 2006-2009 Chevrolet Corvette 2007-2008 Chevrolet Silverado Transgo Shift Kit for the GM 6L45, 6L50, 6L80, and 6L90 automatic transmission. jeqnyjtk xsct tnzbn otid zamuiky jxlsmph bordv pvul nlyev uzfva csrxroo cgrvg ulnirr mzn zuqhyvp