6l80e Transmission No ReverseCheck the transmission fluid level when the engine is off. Transmissions: Diagnosing the Elusive No Reverse. 0:00 / 31:50 6L90 2008 Chevy 2500 Reverse Delay and 3-5 slipping! | Transmission Repair. I have kind of a very similar experience going on right now. 6l80E Transmission Problems. During a rebuild of a GM 6L80 transmission, while the valve body was being serviced, an incorrect spacer plate was accidentally used. In this video, i go over 2 very common problems with the 6L80E that would cause no forward movement. Im 540 to the tire 514 tq all motor converter is a 3,800 triple with wot lock up brand new build ran great on the dyno no slip street tuned it and made it 12 miles i lost lock up a cruise first and then it locked me out of 6th threw a tcc suck open code needless to say the converter company picked up the bill on everything the Torrington bearing failed in the converter. December 17, 2021 During a rebuild of a GM 6L80 transmission, while the valve body was being serviced, an incorrect spacer plate was accidentally used. Both were doing repairs: one had installed updated seals for an intermittent 2-3 flare, while the other installed an upgraded clutch pack. Unlike some older transmission designs, the 6L80/90 applications also apply the Low Reverse (L/R) clutch to aid the low sprag during take-off. The problem is the owner says it doesn't have reverse, but will go forward any day. The Supermatic 6L80 RWD is a fully automatic, 6 speed, rear-wheel drive, electronic-controlled transmission. SOLVED] 4L60E Transmission Won’t Move in Any Gear">. -Failed to reconnect a wire connector. During an overhaul of a U140E transmission, it was determined that the original valve body needed replacement. 6L80E Won't go into forward gears-Reverse is fine LSx Swaps Register or Log In To remove these advertisements. Unlike some older transmission designs, the 6L80/90 applications also apply the Low Reverse (L/R) clutch to aid the low sprag during take-off. Properly Diagnose 6L80 Automatic Transmission Issues">Properly Diagnose 6L80 Automatic Transmission Issues. 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. 4L60E Problems: No Reverse. Old transmission fluid will be awful to the ear. 6L80/6L90 "No Movement" After Repair. He thinks it's an electrical issue, I'm not sure. 2016 GMC Sierra 6L80E No forward gear, no drive, P0796 Video Service Information 1. P0796 transmission pres. Watch this video and learn about the common issues with this transmission. Unlike some older transmission designs, the 6L80/90 applications also apply the Low Reverse (L/R) clutch to aid the low sprag during take-off. Unlike some older transmission designs, the 6L80/90 applications also apply the Low Reverse (L/R) clutch to aid the low sprag during take-off. 6L80E No forward gear, no drive, P0796">2016 GMC Sierra 6L80E No forward gear, no drive, P0796. Silverado 6L80e 6L90 NO DRIVE/Forward Gears FIX!! Griff's Garage 489 subscribers Subscribe 42K views 2 years ago Hopefully this will help some people that may experience this sudden loss of drive. The 6L80E is a 6 speed automatic transmission that uses direct clutch-to-clutch shifting to change gears. I am certain that many have experienced a no-movement forward, no-reverse or abnormal pressure condition with a GM 6L series. Service Bulletin Date: February, 2012. 6L80-E Transmission - No Forward - No Trouble Codes - Transmission Repair. Once the vehicle reaches about 2 MPH, the L/R clutch releases. Copyright 2014 General Motors LLC. Automatic Transmission. 6l80 Series Transmissions No Movement After Rebuild. When a new 3-5-Reverse clutch drum is replaced, it is installed without the 3-5 -Reverse clutch drum bearing. 2016 GMC Sierra 6L80E No forward gear, no …. Sometimes this is an intermittent condition. GM 6L series no-movement conditions: Analysis and repair tips. It is not uncommon to find the reverse gear of a 6L80 failing to engage, which points to a possible problem with the transmission. Compensator feed regulator valve stuck. When a new 3-5-Reverse clutch drum is replaced, it is installed without the 3-5 -Reverse clutch drum bearing. Unlike a rebuilt 6L80 transmission, a remanufactured 6L80 transmission has been completely disassembled and then re-engineered on an assembly line. Quite odd, but I've got a transmission guy pulling it out and fingers crossed we can. Harsh shifts from fourth to fifth or slips in fifth. Discussion Starter · Oct 29, 2019. If the sprag develops a problem, the L/R clutch will hold the output carrier initially. How to diagnose these common 6L80 transmission problems precisely?. 6 LMM Duramax with a 6L80E transmission. 3-5-R Drum weld broken/cracked is typically a no or slipping Reverse condition along with 3rd and 5th Gear issues. October 21, 2016 14,143 Views 6 Min Read In this issue, we’re going to look at a 2007 GMC K2500 equipped with a 6L90E that had no line rise after being rebuilt. I understand that this is not always the case but it. 1 checkball shrunken and out of place causes no Forward. Important: Do not install 1-piece design seal rings on 2-piece seal ring design pump cover. Hi guys, i have a 4l80e that I built two months ago, when everything is cold all grears work great however when things warm up ( like driving for 20 miles or so ) I start loosing reverse. If this doesn’t work then visit your trusted mechanic to see if there is a more serious issue. Slip when Reverse is selected or no reverse. Hopefully this will help some people that may experience this sudden loss of drive in their GM pickemup. The shift transitions must be made directly between Drive and REVERSE with momentary pause in neutral. Circle D 6L80E Transmission Upgrades. 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. Built to maximize performance: this Raybestos Powertrain GM 4L80E performance transmission rebuild kit includes Stage-1 MaxPaks with additional clutch capacity in the Direct, Forward, and Intermediate clutches compared to the 4L80E transmission OE designs. Thanks for watching!📱 Facebook: https://www. 6L90 2008 Chevy 2500 Reverse Delay and 3 …. Silverado 6L80e 6L90 NO DRIVE/Forward Gears FIX!! - YouTube 0:00 / 9:32 Silverado 6L80e 6L90 NO DRIVE/Forward Gears FIX!! Griff's Garage 489 subscribers Subscribe 42K views 2 years ago. I got a 2007 silverado 2500hd w/ 6. 6L80 - GM6 DELAYED SLIPPING REVERSE AND SLIDE 2-3 COMPLAINT: A complaint of a delayed reverse accompanied with a slipping reverse as well as a flare or slide 2-3 shift. Greetings, I'm new to the GM world, Ford and Dodge guy. The Supermatic 6L80 RWD is a fully automatic, 6 speed, rear-wheel drive, electronic-controlled transmission. This prevented the 1-2-3-4 clutch drum splines from engaging the input carrier. 6L80 SERIES TRANSMISSIONS NO MOVEMENT AFTER REBUILD. 6L80 Transmission Problems. With 6L80 transmissions having TCC issues, the TCC Reg valve in the valve body is usually looked at first. I understand that this is not always the case but it. 6l80/6l90 reverse and 3rd and 5th gear problem. 2016 GMC Sierra 6L80E No forward gear, no drive, P0796 Video Service Information 1. This valve, depending on position in which it’s stuck, may cause delays going into gear or harsh, chattering type of shifts or downshift clunks. From a recent Automatic Transmission Service Group (ATSG) Online Technical Bulletin:When the GM 6L80/90 transmission presents with a complaint of no forward or reverse movement, or slipping badly in all. 6L80 (RPO MYC) and 6L90 (RPO MYD) transmissions equipped in the GM C/K full size trucks and SUV’s, Cadillac D body (STS-V) and the Cadillac/Chevrolet Y body (XLR, Corvette) may experience any or all of the following complaints. Discussion Starter · Jan 31, 2020. 96K subscribers Subscribe 16K views 2 years ago Customer concern of check engine light on after truck. The 6L80E is a 6 speed automatic transmission that uses direct clutch-to-clutch shifting to change gears. Then replaced the TEHCM and flashed it. The 6L transmissions use the low sprag to hold the output carrier stationary during vehicle launch in 1st gear. Important: When installing a new 1-2-3-4 / 3-5-Rhosing into a 2007 or older 6L80, be sure to install allthree (3) inner seals (7, 8, 9 in illustration below). Discussion Starter · #4 · Jun 19, 2019. In the case of "No Reverse," the players inside the transmission are: Direct Clutch (also used in 3rd and 4th gear) Low/Reverse Band (also used for engine braking in manual 1st gear) Knowing this, we want to test the line pressure while in Reverse, 3rd gear, 4th gear and in manual 1st. Reverse Clutch Fluid Seal Ring Installation (6L80/90) in SI for correct installation. P-park R-Forward N-Forward D-Forward M-Forward I recently dropped and replaced the valve body to remove the TCM. Damage to the pump itself may be found upon. Both were doing repairs: one had installed updated seals for an intermittent 2-3 flare, while the other installed an upgraded clutch. 6L80/6L90: No Movement After Repair. Installed the rebuilt transmission and still no reverse. Other valve body problems may occur at the mileage of 300 000 km. Line pressure will typically be normal with these conditions. Im 540 to the tire 514 tq all motor converter is a 3,800 triple with wot lock up brand new build ran great on the dyno no slip street tuned it and made it 12 miles i lost lock up a cruise first and then it locked me out of 6th threw a tcc suck open code needless to say the converter company picked up the bill on everything the Torrington bearing failed in the converter. 1, 2013 After overhaul the vehicle loses both forward and reverse movement. Condition 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). I have a 2002 Chevy Impala LS 3800 series 2 with a 4t65e transmission. Perform this procedure 10 times. 6L80-E Transmission - No Forward - No Trouble Codes - Transmission Repair. How to fix this 6L80 transmission problem? Firstly inspect each stator support shaft for signs of damage, then install upgraded seals to solve the problem. The 6L80 / 6L90 TEHCM is located inside of the transmission on the 6L80 / 6L90 valve body. This means there are no transmission bands, and the gear selection is controlled by a 32-bit computer controller inside of the valve body 6L80 TEHCM. It is not uncommon to find the reverse gear of a 6L80 failing to engage, which points to a possible problem with the transmission. at first it will start out going into reverse slow but will go into it and dont slip, but after a while i have nothing at all in. The signs of a reverse gear engagement failure can be; difficulty in engaging the gear or no gear is not engagement. This blocked supply pressure to the 3-5-R regulator valve which prevented the. I am looking at getting a 2009 GM Ambulance with the 6. What they have in common is working on the 6L80/6L90 for the first time. GM 6L80E/6L90E Transmission Problems …. They both had the same question: what would cause a "no-move" Forward or Reverse after the rebuild?. First off it takes twice or more pressure to have reverse gear than the forward gears. 4L80E Transmission MaxPak Performance Super Master …. I have kind of a very similar experience going on right now. Watch on Diagnosing No Reverse If you are an observant person you might be able to help yourself identify which problem caused the 4L60E to lose reverse. Some/Most 6L80E's do not have have a L1 positionSo this may not be possible, But for it to get stuck in the the 1-6 Feed the trans had to be in a First Gear with Engine Braking condition (1-2-3-4 Clutch & Low Reverse Clutch Applied)Probably through the "Tap-Shift" feature that was on the truck the trans came from, If your swap vehicle. GM 6L80 Transmission Reverse Drum Failure. Do not confuse Internal Mode Switch (IMS) states with TPF switches. 0:00 / 2:29 GM 6L80 Transmission Reverse Drum Failure Thompson AutoTest 5. To reset the transmission control module for the Chevy Silverado, watch: https://www. Reverse Fails to Engage - If you've selected Reverse and your vehicle still won't move, then it's possible the park prawl (the metal piece that stops your vehicle from rolling), or one of the clutches has become damaged. The new 6L80E transmission (6-speed / Longitudinal / 8,000 lb vehicle weight / Electronically controlled) was introduced in 2005, and found its way into cars like the Corvette, Cadillac CTS-V, and the Chevrolet Camaro ZL1. It is not uncommon to find the reverse gear of a 6L80 failing to engage, which points to a possible problem with the transmission. When I dropped the valve body, there are only three things I could have screwed up. A 6L90 valve body installed on 6L80 is a no Reverse condition. Our high-performance transmissions —including GM 6L80 (level 1 and 2) and GL90 — are built to the horsepower, torque, and rear gear ratio specs of the engine that it will be matched to. Problem – Trucks equipped with the 6-speed 6L80 or 6L90 transmission may experience no forward or reverse engagement, or slipping between the gears. If the seals are the 2-piece design shown below they do not need to be replaced unless they. However, filter quality may not be the underlying issue. Also featuring a torque converter, the transmissions come with a complete master overhaul kit with new gaskets, seals, rings, and pistons. On this video we talk about the common issued with this particular unit. When this is complete, shift the vehicle back into the Park position. The most common is losing all forward gears or stops moving forward. This drove up prices and made it hard to sell the job and make money. com/watch?v=yu6WDIWBf3g The transmission fluid needs to be replaced every 30,000 to 60,000 miles. GM 6L80 Transmission Reverse Drum Failure - YouTube 0:00 / 2:29 GM 6L80 Transmission Reverse Drum Failure Thompson AutoTest 5. 4) The transmission fluid temperature should be between 158°F and 239°F. reset transmission control module chevy silverado?">How do i reset transmission control module chevy silverado?. Hi guys, i have a 4l80e that I built two months ago, when everything is cold all grears work great however when things warm up ( like driving for 20 miles or so ) I start loosing reverse. 6l80 no reverse after rebuild. Otherwise, malfunction of the valve body and its solenoid valves is most likely because of contamination by products of the wear. 0:00 / 31:50 6L90 2008 Chevy 2500 Reverse Delay and 3-5 slipping! | Transmission Repair. at first it will start out going into reverse slow but will go into it and dont slip, but after a while i have nothing at all in. It could be anything from low fluid level so check that first. 6L80 SERIES TRANSMISSIONS NO MOVEMENT …. Things like converter clutch failures, output carrier lube failures, 4-5-6 clutch burnout, 4-5-6 clutch hub with the output carrier shaft snapping or twisting (caused by shift overlap. The problem may be severe enough to produce solenoid performance codes placing the vehicle into a failsafe condition. Objectively, it is a fairly simple repair: simply remove the transmission pan, remove the valve body, unbolt the TEHCM from the valve body and install the new one. If this is OK, the decision must be made to inspect the TEHCM or pull the unit and look at the. The signs of a reverse gear engagement failure can be; difficulty in engaging the gear or no gear is not. With the engine at idle shift from NEUTRAL to REVERSE and leave the shift lever in REVERSE for 5 seconds. Discussion Starter · Nov 10, 2015. I know alittle about GM transmissions and I know that the rear servo is one of the items that control reverse. Getting to Know the 6L80/90E. 3-5-R Drum weld broken/cracked is typically a no or slipping Reverse condition along with 3rd and 5th Gear issues. Slipping Between Gears - If you experience slipping in reverse, or between 2-3, then it's very likely that the 1-2-3-3/5-R. GM 6L80E/6L90E Transmission Problems And Performance Upgrades. 7K views 3 years ago Thanks for watching! 📱 Facebook:. Unlike a rebuilt 6L80 transmission, a remanufactured 6L80 transmission has been completely disassembled and then re-engineered on an assembly line. This is a discussion on 4L80e no reverse when hot within the Automatic Transmission forums, part of the Drivetrain category; Hi guys, i have a 4l80e that I built two months ago, when everything is cold all grears work great LinkBack Thread Tools 08-07-2012, 11:35 AM #1 LOVonRUN Junior Member Join Date Aug 2011 Location Texas Posts 5 black. 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. In this video, i go over 2 very common problems with the 6L80E that would cause no forward movement. Refer to 1-2-3-4 and 3-5 Reverse ClutchFluid Seal Ring Installation (6L80/90) in SI for correctinstallation. Hopefully this will help many of you in the repair of GM 6L45, 6L50, 6L80 and 6L90 transmissions. Greetings, I'm new to the GM world, Ford and Dodge guy. If this is the case, the transmission pump should be disassembled and inspected for possible damage. First is a shrunk down #1 checkball and the 2nd is a cracked 1-2-3-4 clutch piston, in this. Some/Most 6L80E's do not have have a L1 positionSo this may not be possible, But for it to get stuck in the the 1-6 Feed the trans had to be in a First Gear with Engine Braking condition (1-2-3-4 Clutch & Low Reverse Clutch Applied)Probably through the "Tap-Shift" feature that was on the truck the trans came from, If your swap vehicle. Solution: Here’s a way that you can check to be sure your transmission pump has failed. I am certain that many have experienced a no-movement forward, no-reverse or abnormal pressure. General Repair Products EV Bizz Transmission TECH/TALK March 2019 Issue In This Issue GM 4T65E: Front Seal “Walk Out” GM 6T40 Series Transmissions: No Third, Fifth or Reverse Gears GM 6L80/90: No Fourth, Fifth or Sixth Gears GM 6L80/90: Clutch Clearance Specifications By Transmission Digest March 1, 2019. Reverse delayed engagement 6l80. A 6L90 valve body installed on 6L80 is a no Reverse condition. Any ideas? Reply Save Like 1 - 3 of 3 Posts thegawd · #2 · Jan 31, 2020. May 3, 2013 · 6L80 - GM6 DELAYED SLIPPING REVERSE AND SLIDE 2-3 COMPLAINT: A complaint of a delayed reverse accompanied with a slipping reverse as well as a flare or slide 2-3 shift. Each component is inspected, cleaned, and reconditioned by a technician that specializes in that particular stage of the process. The signs of a reverse gear engagement failure can be; difficulty in engaging. 6L80E Transmission Problems & Solutions. No. 6L80 / 6L90 TEHCM Problems & Solutions">6L80 / 6L90 TEHCM Problems & Solutions. Is the 6L80E a good transmission?. If there was an egg smell for a while when. As people across the country began buying these parts, supply could not keep up with demand. Important: Do not install 1-piece design seal rings on a 2-piece seal ring design pump cover. A number of 6L80 transmission. com/thompsonautotest123/☕ Buy me a coffee : https://ko-fi. 4L80e no reverse when hot. GM 6L series no-movement conditions: Analysis and repair tips. 3) The vehicle engine should be at idle, no throttle should be applied as well as no external engine RPM control. Interestingly enough, Lorenzo Ortiz from Phillips Transmissions had a 2016 6L80 come into his shop with a no forward but good reverse complaint from the. 4L80E Transmission MaxPak Performance Super Master Kit 1997. The shift transitions must be made directly between Drive and REVERSE with momentary pause in neutral. If there is still no reverse during the test, the transmission must be removed for inspection to make sure that there is nothing in the direct-clutch drum (remember, there are two separate apply areas for reverse vs. 6L80-E Transmission - No Forward - No Trouble Codes - Transmission Repair. Compared to the 4L60E GM bolted into C5 Corvettes and fourth-gen F-bodies, the 6L80E is one brute of a transmission. 6L80 Automatic Transmission. GM 6L80 Transmission Early Failure Issues & Fixes. It essentially just revs or pops out of gear and into neutral from a stop. But first we’re going to take a brief look at what makes the 6L80/90E transmission tick. What are the common 6L80 transmission problems? Most of the common 6L80 transmission problems are: Reverse gear Engagement failure. Reverse delayed engagement 6l80. 5 checkball out of place is no Reverse. If the seals are the 2-piece design shown below they do not need to be replaced unless they are worn or damaged. Install the clutch pack retaining snap ring so the snap ring gap straddles the machined lug in the drum. Transmission Not Moving Or Excessive Slipping">GM: Transmission Not Moving Or Excessive Slipping. What are the common 6L80 transmission problems? Most of the common 6L80 transmission problems are: Reverse gear Engagement failure Slipping 2-3 Gears Slipping in First Gear Clutch Failure Cracked clutch drum Why is reverse gear engagement failure a 6L80 transmission problem?. DTCs P0776, P2715 or P2723are found as an active or a history code inthe TCM. Discussion Starter · #1 · Dec 4, 2021 I got a 2007 silverado 2500hd w/ 6. When a new 3-5-Reverse clutch drum is replaced, it is installed without the 3-5 -Reverse clutch drum bearing. With 6L80 transmissions having TCC issues, the TCC Reg valve in the valve body is usually looked at first. 4L80e no reverse when hot. What are the common 6L80 transmission problems? Most of the common 6L80 transmission problems are: Reverse gear Engagement failure. Now start your engine and check the level of fluid in the engine again. Silverado 6L80e 6L90 NO DRIVE/Forward Gears FIX!!. 2010 6L80e rebuild no reverse. Harsh shifts from second to third. Since it's 4 hours away from me I want to have an idea of. Still no reverse. During a rebuild of a GM 6L80 transmission, while the valve body was being serviced, an incorrect spacer plate was accidentally used. The reverse gear is critical for the drivability of any vehicle. Watch this video and learn about the common issues with this transmission. In response to the question ‘how reliable is the 6L80 transmission?’, the answer partly depends on how well the transmission is maintained. Silverado 6L80e 6L90 NO DRIVE/Forward Gears FIX!! Griff's Garage 489 subscribers Subscribe 42K views 2 years ago Hopefully this will help some people that may experience this sudden loss of drive. 7K views 3 years ago Thanks for. 4) The transmission fluid temperature should be between 158°F and 239°F. It is not uncommon to find the reverse gear of a 6L80 failing to engage, which points to a possible problem with the transmission. 6L80E, No Forward Movement. If the level has not changed at all, then the transmission pump is broken. 2016 GMC Sierra 6L80E No forward gear, no drive, P0796. Our high-performance transmissions —including GM 6L80 (level 1 and 2) and GL90 — are built to the horsepower, torque, and rear gear ratio specs of the engine that it will be matched to. TruckIT. He thinks it's an electrical issue, I'm not sure. Slips in Reverse Slips in 3rd Slips in 5th Delayed Reverse Engagement Intermittent Hard Shifts into 3rd and/or 5th. This ranges from harsh or slow shifting, failure to engage gears, or gear slipping. Chevy Silverado 2500 HD Transmission Problems & Cost. I recently had my 6l80e transmission rebuilt after losing reverse. 6L80 & 6L90 Installation Guide. 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. In GM speak, the "6" in 6L80E denotes the number of forward speeds, while the. Customer concern of check engine light on after truck started to slip and studder was reving in drive now wont go forward or reverse. Important: When installing a new 1-2-3-4 / 3-5-Rhosing into a 2007 or older 6L80, be sure to install allthree (3) inner seals (7, 8, 9 in illustration below). Newer Chevrolet cars with a 6-speed 6L80 transmission can experience sporadic or constant transmission issues. Incorrect valve body installed. 5) Now preform 3 shift cycles of Park to Reverse. Didnt know my trans lines were dropped down and went to make a u turn and the steering pinned the one line in between itself and the frame and put a hole in it. Transmission suddenly out while driving! No reverse or any ">Transmission suddenly out while driving! No reverse or any. Hopefully this will help some people that may experience this sudden loss of drive in their GM pickemup. 6L80-E Transmission - No Forward. GM 6L80 E Transmission - No Forward - No Trouble Codes - Transmission Repair. Remanufactured 6L80 / 6L90 Transmission …. I guess my question is if the center suport is leaking will that cause this problem?. 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). Silverado 6L80e 6L90 NO DRIVE/Forward Gears FIX!. Transmission suddenly out while driving! No reverse or any. No smoke or signs of leak. What they have in common is working on the 6L80/6L90 for the first time. So first gear rarely will engage after "driving" last Saturday. if it is not the rear band then place the shift selector into first gear manual and see if it will go forward. 31K subscribers 357 37K views 4 years ago 6l80/6l90 reverse and 3rd and 5th. Diagnosing the Elusive No Reverse with. The 4L80E Transmission MaxPak Performance Super Master Kit 1997-On includes: Forward/Direct MaxPak (14 Stage-1, 10 Kolene, 3 Thin Forward Kolene, 1 Direct Steel Apply Plate. Transmission repair manuals GM 6L45, 6L80 / 90. Going down the road all the sudden I have no forward or reverse gears exactly like mychevz71. 6 LMM Duramax with a 6L80E transmission. 700R4 Rebuilt, Works fine in forward gears, no reverse, loads up like its in gear but doesn''t move. GM 4L80 Transmissions: Diagnosing the Elusive No …. Remove the valve body. Failure to install these seals can result in no reverse, noforward or distressed clutches. -Failed to reconnect the gear select sensor properly. I'm finishing up a L92 and 6L80E swap in my buggy, and prepping for a shakedown run. It is not uncommon to find the reverse gear of a 6L80 failing to engage, which points to a possible problem with the transmission. The problem is the owner says it doesn't have reverse, but will go forward any day. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. Almost every 6L80 that shows up is either a converter failure, plugged filter, burnt 4-5-6 clutch, or a damaged stator and bell. 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. Notice in Figure 5 that the splines on the input carrier and the mating splines in the drum are short. Installed the rebuilt transmission and still no reverse. Common 6L80 transmission problems Reverse Fails to Engage If you’ve selected Reverse and your vehicle still won’t move, then it’s possible the park prawl (the metal piece that stops your vehicle from rolling), or one of the clutches has become damaged. 3rd and 4th gears in the direct-clutch drum) and that the band is clamping properly on the drum to hold for reverse. I can bypass by manually shifting into 2nd, and all gears after shift fine. I'm finishing up a L92 and 6L80E swap in my buggy, and prepping for a shakedown run. 6L90 2008 Chevy 2500 Reverse Delay and 3. This blocked supply pressure to the 3-5-R regulator valve which prevented the 3-5-R clutch from applying. 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. Supermatic 6L80 Transmission Kit Installation Instructions. This valve, depending on position in which it’s stuck, may. With 6L80 transmissions having TCC issues, the TCC Reg valve in the valve body is usually looked at first. Getting back to the 6L80 transmission, with the years they have been on the road; we now see the types of failures for which they are susceptible. When shifting into low grear with the shifter it holds good and works 1st grear good so I know the low/reverse band is working. This 4L80E Transmission MaxPak Performance Rebuild Kit 97-ON may fit but is not limited to the following vehicles: Chevrolet C2500, C3500, K2500, K3500 97-13 Chevrolet Silverado 2500, 3500 97-13 Chevrolet Suburban 2500 97-13 Chevrolet Tahoe 97-03 Chevrolet Express 2500, 3500, 4500 97-09 Chevrolet Avalanche V8 02-06 GMC Sierra V8 2500, 3500 97-13. 0:00 / 2:29 GM 6L80 Transmission Reverse Drum Failure Thompson AutoTest 5. Refer to 1-2-3-4 and 3-5 Reverse ClutchFluid Seal Ring Installation (6L80/90) in SI for correctinstallation. Question: 4L80e no reverse when hot. 5) Now preform 3 shift cycles of Park to Reverse. I take a look and see the line was pinched so I fix the line with rubber. This means there are no transmission bands, and the gear selection is controlled by a 32-bit computer controller inside of the valve body 6L80 TEHCM. If this is OK, the decision must be made to inspect. Then replaced the TEHCM and flashed it. I recently had my 6l80e transmission rebuilt after losing reverse. 3) The vehicle engine should be at idle, no throttle should be applied as well as no external engine RPM control. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. 6L80E goes forward in reverse. 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. 118″, 1 Snap Ring) Intermediate MaxPak (5 Stage-1, 5 Kolene, 1 Snap Ring) Overrun MaxPak (3 Stage-1, 3 Kolene) 4th Clutch MaxPak (5 Stage-1, 5 Kolene) Intermediate Black Band. 2 additional Stage-1 Direct, 2 additional Stage-1 Forward, and 1 additional. GM 6L series no-movement conditions: Analysis and repair tips. The 2-piece seal ring design pump cover can be. This is the main reason to repair 6L 45/6L 80 gearbox, which is caused by transmission overheating and oil starvation. With the engine at idle, shift from NEUTRAL to DRIVE and leave the shift lever in DRIVE for 5 seconds. The driver can manually select gears via the gear selector. A 6L90 valve body installed on 6L80 is a no Reverse condition. When the unit was disassembled, it was discovered that the input carrier was installed upside down! This prevented the 1-2-3-4 housing splines from engaging the input carrier and resulted in no move, Forward or Reverse. It's exactly like it was in neutral. Silverado 6L80e 6L90 NO DRIVE/Forward Gears FIX!! - YouTube 0:00 / 9:32 Silverado 6L80e 6L90 NO DRIVE/Forward Gears FIX!! Griff's Garage 489 subscribers Subscribe 42K views 2 years ago. Possible DTCs include P0776, P2715 or P2723. 6L80 Transmission Kit Installation Instructions ">Supermatic 6L80 Transmission Kit Installation Instructions. Problem is, when I put it in reverse, it goes forward. I got a 2007 silverado 2500hd w/ 6. It consists primarily of a 4-element torque converter, an integral fluid pump and converter housing, a single and a double planetary gear set, friction and mechanical clutch assemblies, and hydraulic pressurization and control system. Reverse Gear Engagement Failure. Hopefully this will help many of you in the repair of GM 6L45, 6L50, 6L80 and 6L90 transmissions. I am looking at getting a 2009 GM Ambulance with the 6. If the seals are the 2-piece design shown below, theydo not need to be replaced unless they are worn ordamaged. Slips on acceleration when passing. Line pressure may be RPM erratic and all over the place as it is fed by line pressure. -The 4 round seals against the valve plate could have fallen out. 6L80 SERIES TRANSMISSIONS NO MOVEMENT AFTER REBUILD Nov. I am looking at getting a 2009 GM Ambulance with the 6. Customer concern of check engine light on after truck started to slip and studder was reving in drive now wont go forward or reverse. Delayed engagement into reverse. Discussion Starter · #1 · Dec 4, 2021 I got a 2007 silverado 2500hd w/ 6. Reverse Clutch Fluid Seal Ring Installation (6L80/90) in SI for correct installation. If during the test our answer gives us a positive shift into reverse, we know there is an issue applying the band that can typically be resolved without removing the transmission. Greetings, I'm new to the GM world, Ford and Dodge guy. 6l80/6l90 reverse and 3rd and 5th gear problem. Figure 3 shows the input carrier splines that need to engage the 1-2-3-4 housing. What are the common 6L80 transmission problems? Most of the common 6L80 transmission problems are: Reverse gear Engagement failure Slipping 2-3 Gears Slipping in First Gear Clutch Failure Cracked clutch drum Why is reverse gear engagement failure a 6L80 transmission problem?. P0796 transmission pres. Greetings, I'm new to the GM world, Ford and Dodge guy. GM 6L80/90: Cracked or Split Sump Filter. Solution – This problem could be caused by a cracked or split transmission filter. How to fix this 6L80 transmission problem? Firstly inspect each stator support shaft for signs of damage, then install upgraded seals to solve the problem. The 1947 We are after the Transmission Fluid Pressure Switch state (TFP Switch 3 Hi/Low or Open/Closed) Hi/Open meaning the 1-2-3-4 clutch has pressure. Reverse Clutch Fluid Seal Ring Installation (6L80/90) in SI for correct installation. A new drum does not come with this bearing unless the 3-5-Reverse clutch drum kit is purchased. 6l80/6l90 reverse and 3rd and 5th gear problem. Along with fluid changes, terrible sounds will come from the transmission. A new drum does not come with this bearing unless the 3-5-Reverse clutch drum kit is purchased. No reverse and maybe 3rd gear on 6l80 please help. 4L80E no codes, no reverse, all forward gears great!. Condition 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). Tiger Transmissions. Properly Diagnose 6L80 Automatic Transmission Issues. Customer concern of check engine light on after truck started to slip and studder was reving in drive now wont go forward or reverse. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. Installed the rebuilt transmission and still no.