Buick Enclave Transmission Problems & Cost | 6T75E

Built on the GM Lambda platform, the Buick Enclave is a midsize crossover that offers 3 rows of seating in a premium package. The first generation 2008-2017 Buick Enclave used the 6T75E 6-speed automatic transmission, and the second gen Enclave got a new 9-speed 9T65 transmission starting in the 2018 model year. These are generally reliable gearboxes, but Buick Enclave transmission problems do happen, so let’s figure out what you can do about them.

Need a replacement transmission? Get an estimate for replacement transmissions and local installation. Look up your transmission model by vehicle make and model.

What Transmission Do I Have?

Buick Enclave Transmission Models

Buick Enclave: 6T75E Transmission (2008-2017)
Buick Enclave: 9T65 Transmission (2018-Up)

Buick Enclave Transmission Replacement Cost Estimate

Pricing varies by model. To be 100% sure on pricing, have your VIN# handy and use our Get An Estimate feature to look up your transmission by VIN#.

Replacement 6T75E Transmission:

What are the DTC codes related to Buick Enclave transmission problems?

Buick Enclave Transmission Recalls

2014 Buick Enclave Recall 14V092000 / 14048

Summary – According to the recall, the Buick Enclave transmission shift lever may become detached from the transmission shift cable adjuster. If this happens, the transmission shifter won’t work properly, and the gear indicator won’t be able to display the gear that’s actually selected.
Consequence – Should the shifter become detached while the truck is being driven, the driver won’t be able to select Park, even though the shifter is in the correct position. This can lead to an unintended rollaway, resulting in serious property damage and/or injury.
Remedy – This recall began on April 10, 2014, and Buick dealers were instructed to inspect and replace any affected transmission shift cable adjusters, free of charge. Owners can contact Buick at 1-866-694-6546, referring to recall # 14048. Or they can call the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236

2009 Buick Enclave Recall 09V073000 / 09041

Summary – On some 2009 Buick Enclave’s, the transmission shift cable adjustment clip may come loose, causing the gear indicator to display the wrong gear.
Consequence – If this problem occurs, the driver could remove the ignition key and exit the vehicle thinking the transmission is in Park, even though it isn’t. This can lead to a rollaway, which can cause injury and/or property damage. A lesser consequence would be the inability to start the vehicle because the transmission is not in Park.
Remedy – This recall began on March 24, 2009, and Buick dealers were instructed to inspect and replace any affected transmission shift cable adjustment clips, free of charge. Owners can contact Buick at 1-866-694-6546, referring to recall # 09041. Or they can call the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236

Buick Enclave Technical Service Bulletins (TSB)

TSB PI4075 – 6T75 transmission overheating
2008 – 2012 Buick Enclave
Problem – The 6T75 transmission could experience an overtemperature situation, even if it’s not warranted by the driving conditions. This issue will be accompanied by a warning message in the drivers information center (if so equipped) and one or both of the following DTC’s: P0218 and/or P0634.
Solution – If a mechanical issue is not determined to be at fault, then it’s possible that the problem is caused by too much transmission fluid, dirty transmission fluid or restrictions in the transmission cooler circuit. Click the above link to learn more about this TSB.

TSB 09-04-21-004B – Fluid leaking from the transmission or transfer case
2008 – 2012 Buick Enclave
Problem – A fluid leak is possible from either the transmission case to transfer case interface, or the transfer case left hand weep hole.
Solution – For a leak coming from the transfer case to transmission case interface, a new transfer case O ring seal will be needed. For a leak coming from the transfer case left side weep hole, a new transfer case input shaft seal and transfer case O ring seal will be needed. To learn more about this TSB, click the link above.

TSB 07-07-30-019 – Check engine light on with poor vehicle performance – 6T70 Transmission | 6T75 Transmission
2008 Buick Enclave – 2007 GMC Acadia – 2007 Pontiac G6 – 2007 Saturn Aura – 2007 Saturn Outlook
Problem – Drivers may experience poor engine/transmission performance, along with the following transmission diagnostic trouble codes: P0716, P0717, P0722, P0723, P0751, P0756, P0776, P0796, P2714, P2723
Solution – These transmission problems may be caused by a failed speed sensor

TSB 13120A – 2013 Buick Enclave
Problem – The torque converter clutch solenoid can stick due to debris in the transmission. When the vehicle is at the end of a coast-down, as the vehicle is coming to a stop, a stuck solenoid will fail to release the torque converter clutch. This keeps the engine directly connected to the driven wheels. As the vehicle stops, the engine speed will be pulled down below normal idle speed and the engine may stall. The vehicle can be immediately restarted and driven.
Solution – The valve control solenoid should be replaced, and the transmission control module will have to be reprogrammed in order to correct the problem.

TSB 09-07-30-012B – 2008-2009 Buick Enclave
Problem – Owners may experience a Check Engine/SES light along with no reverse and/or a slip / flare or harsh shifts in 3rd and/or 5th gear. This condition may be caused by a broken 3-5-R clutch wave plate, allowing the apply piston to over- stroke, causing the piston to leak and causing loss of gear application. This normally will not occur before approximately 32,000 km (20,000 mi). Debris generated by the condition can affect the operation of the speed sensors and other clutches.
Solution – A new 35R clutch wave plate will need to be installed.

PIP4627A – 35R clutch wave plate broken – 6T70 Transmission | 6T75 Transmission
2007 – 2009 Saturn Aura – 2007 – 2009 Saturn Outlook – 2008 – 2009 Saturn Vue – 2007 – 2009 GMC Acadia – 2007 – 2009 Pontiac G5 – 2008 – 2009 Pontiac Torrent – 2008 – 2009 Buick Enclave – 2008 – 2009 Chevrolet Equinox – 2008 – 2009 Chevrolet Malibu – 2009 Chevrolet Traverse
Problem – On vehicles equipped with the 3.6L V6 and 6-speed automatic transmission, drivers may experience no reverse, slipping, and/or harsh shifting between 3rd-5th gears. They may also have diagnostic trouble codes P0776 and P0842. This condition is typically caused by a broken 35R clutch wave plate.
Solution – During the repair/rebuild process, the wave plate must be installed properly (with the rounded edge of the internal splines facing the 35R piston), in order to prevent premature failure.

TSB 13120A – Torque converter clutch sticking – 6T70 Transmission | 6T75 Transmission
2013 Buick Enclave – 2013 Cadillac SRX – 2013 Cadillac XTS – 2013 Chevrolet Malibu – 2013 Chevrolet Traverse – 2013 GMC Acadia – 2013 GMC Terrain
Problem – The torque converter clutch solenoid can stick due to debris in the transmission. When the vehicle is at the end of a coast-down, as the vehicle is coming to a stop, a stuck solenoid will fail to release the torque converter clutch. This keeps the engine directly connected to the driven wheels. As the vehicle stops, the engine speed will be pulled down below normal idle speed and the engine may stall. The vehicle can be immediately restarted and driven.
Solution – The valve control solenoid should be replaced, and the transmission control module will have to be reprogrammed in order to correct the problem.

Common Problems with the Buick Enclave Transmission

Related to DTC P0741 – 2008-2010 Buick Enclave
Problem – If after rebuilding a 6T75E, the TCC remains stuck in the ‘off’ position, the problem may be due to using the incorrect control valve channel upper plate.
Solution – Install a revised control valve channel upper plate with slot (GM part #24226373).

Input/Output Speed Sensor Issues – 6T70E Transmission
Problem – When repairing a failed input speed sensor or output speed sensor, steering system damage could occur.
Solution – To avoid damage to the clock springs, the splined steering knuckle must be prevented from falling out of the steering rack when dropping the subframe to access the valve body.

Lack of Response
Leaking Fluid
Low Fluid
Burning Smell
Grinding or Shaking
Whining, Clunking or Humming
Refuses to Go Into Gear
Torque Converter Issues
Valve Body Issues
Transmission Noisy in Neutral
Gears Slipping
No 3rd or 4th Gear
No 1st or 2nd Gear
No Reverse
Dragging Clutch
Trouble Codes / Check Engine Light

Can I drive with a transmission problem?

Depending on the symptoms, simple Buick Enclave transmission problems can easily morph into an expensive disaster. So it’s best to get gearbox issues properly diagnosed, before have a chance to get out of hand.

How often does a Buick Enclave transmission need to be replaced?

Maintenance and driving style have a huge affect on how long the average Buick Enclave 6T75 transmission will last. But factory design flaws play a part too. On average, we’ve seen the Buick Enclave transmission last for between 130,000-180,000 miles. A high quality replacement transmission however, can last considerably longer if all of the factory design flaws have been properly addressed.

How are Buick Enclave transmission issues diagnosed?

Guessing what a transmission problem might be caused by is pretty easy. But figuring out what the problem actually is, takes lots of experience and tools. Most mechanics can pull diagnostic trouble codes from the Buick’s computer in a matter of minutes. That way they’ll know what to look for to verify the problem.

How is a Buick Enclave transmission replaced?

To replace a Buick Enclave transmission, it has to be lifted off the ground in order to gain access to all of the transmission parts that have to be unbolted. The engine may also need to be unbolted. Then the transmission can be lowered to the ground (typically with a transmission jack), so the new transmission can be installed. Once it is in place, for the 6T75E, the vehicle PCM will have to be reprogrammed / reflashed to accept the new transmission using the latest GM subscription.

Recommendations for Buick Enclave transmission issues?

To save time and get back on the road faster, have your 17-digit VIN# handy and you can get an online quote for a reman Buick Enclave transmission here, then find a local shop using our Find a Shop guide to install it for you.

How to Solve Buick Enclave Transmission Problems

Solution A: Buy a Used Buick Enclave Transmission

The quickest way to fix your transmission problems is to simply buy a used 6T75E transmission and have it installed. These can be found at most junk yards, and they often come with a 30-90 day warranty. However, there’s no way to determine the actual condition of the internal components, so you could be spending a bunch of money to have the exact same problems. Plus, that warranty only covers the transmission if it’s defective, not the labor costs that you’ll have to pay.

Solution B: Buy a Rebuilt Buick Enclave Transmission

Another option would be a rebuilt 6T75E transmission. A local repair shop will remove your transmission, then install a bunch of new parts during the rebuild. The problem here is, the skills and experience of each transmission rebuilder will vary widely from shop to shop, so you could have problems from something that wasn’t adjusted properly. And the 1-2 year warranty might only cover you at certain transmission repair shops, in a specific geographical area.

Solution C: Buy a Remanufactured Buick Enclave Transmission

Many owners depend on their vehicle to commute and get things done. Their gasoline engines are designed to go 100’s of thousands of miles, so it makes sense to invest in a quality remanufactured 6T75E transmission. You’ll get a much longer service life, and the warranty will cover any necessary transmission repairs.

Need a replacement transmission? Get an estimate for replacement transmissions and local installation. Look up your transmission model by vehicle make and model.

What Transmission Do I Have?

What Problem Does Your Buick Enclave Have?

Let us know the year, mileage and problem you’re having as well as any trouble (OBD) codes you’ve found. If you’ve been given a quote or paid for a repair, we’d like to hear about that too!