2015 Tahoe w/ 66k miles - just had to replace transmission

[Loren Edwards]

I bought the truck in November of 2018 with 54k on it. The truck was one owner and from everything I could tell had been babied. The interior and exterior were nearly perfect.

We had 2 years and 12k miles of trouble-free use and we also babied the truck.

Two weeks ago I was towing 1000 lbs. of play sand in our small 8' utility trailer (so no more than 2500 lbs. total weight). The trip was just across town and was less than 5 miles total distance. I was almost home and I noticed the truck was acting funny. As I started from a stop it was acting like it didn't know what gear to go in around 3rd gear. It was a hard sensation to describe, the truck just seemed to stumble around going into 3rd.

I took it to be looked at and was given the diagnosis that the torque converter went and we would need to replace the transmission. $5,000 later and It's back to normal.

I just want to post this so it might help others with future decisions. When buying the truck I was trying to decide between the Tahoe or a 4-runner and I regret the choice I made.

 

[BlackYukon]

I bought the truck in November of 2018 with 54k on it. The truck was one owner and from everything I could tell had been babied. The interior and exterior were nearly perfect.

We had 2 years and 12k miles of trouble-free use and we also babied the truck.

Two weeks ago I was towing 1000 lbs. of play sand in our small 8' utility trailer (so no more than 2500 lbs. total weight). The trip was just across town and was less than 5 miles total distance. I was almost home and I noticed the truck was acting funny. As I started from a stop it was acting like it didn't know what gear to go in around 3rd gear. It was a hard sensation to describe, the truck just seemed to stumble around going into 3rd.

I took it to be looked at and was given the diagnosis that the torque converter went and we would need to replace the transmission. $5,000 later and It's back to normal.

I just want to post this so it might help others with future decisions. When buying the truck I was trying to decide between the Tahoe or a 4-runner and I regret the choice I made.

Was the transmission a 6-speed or an 8-speed?

 

[Loren Edwards]

Was the transmission a 6-speed or an 8-speed?

6 speed. I believe it's the 6L80.

 

[BlackYukon]

6 speed. I believe it's the 6L80.

That's unfortunate. The 6L80's are usually very reliable. Did you reach out to GM? On a 3 year old vehicle with 66K miles surely they would be able to help in some way or another with the cost of the new trans.

 

[Loren Edwards]

That's unfortunate. The 6L80's are usually very reliable. Did you reach out to GM? On a 3 year old vehicle with 66K miles surely they would be able to help in some way or another with the cost of the new trans.

It's a 2015. Its warranty ended in March of 2020. I had done research before buying and decided against a Yukon because I had read horror stories on the 8 speed transmission. I thought, go with the smaller engine and the 6 speed just to be safe. Ha!

 

[BlackYukon]

It's a 2015. Its warranty ended in March of 2020. I had done research before buying and decided against a Yukon because I had read horror stories on the 8 speed transmission. I thought, go with the smaller engine and the 6 speed just to be safe. Ha!

oops I misread the years. Yeah That's why I asked, The 8-speed is usually what comes to mind when people talk about having Trans problems for this generation of GM Trucks/suv's. If this incident doesn't deter you from GM in the future, the 10-Speed seems to be built like a tank, I haven't seen many people have problem with it.

 

[Bill 1960]

Thanks for sharing, I’m feeling your pain. Literally. Mine’s at the dealer getting a new transmission right now at 61k miles.

And they just called me to say come and look at what they drained out of the transfer case. Sounds like it’s ready to fail also.

 

[ivin74]

Thanks for sharing, I’m feeling your pain. Literally. Mine’s at the dealer getting a new transmission right now at 61k miles.

And they just called me to say come and look at what they drained out of the transfer case. Sounds like it’s ready to fail also.

I blows my mind that the newer transmisions are going out so early. The 4l60s are giving owners over 200k miles trouble free.

Post up some pics of their findings.

 

[JonnyTahoe]

I blows my mind that the newer transmisions are going out so early. The 4l60s are giving owners over 200k miles trouble free.

Post up some pics of their findings.

My 2000 made it to 294977.

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics, please.

I'm sorry to read about your bad experience with your-new-to-you truck. Lots of folks here have gotten well over 100,000 miles out of their transmissions on these trucks.