Fixed:Everyone’s fav topic: 6l80 issues

[usaf27]

Don’t give up. I have faith in you!

 

[Starkworks]

@NickTransmissions - I think I may have found the issue. The low reverse sprag spins clockwise and locks counter clockwise.

 

[NickTransmissions]

@NickTransmissions - I think I may have found the issue. The low reverse sprag spins clockwise and locks counter clockwise.

Assuming the outer race is spinning clockwise instead of counter clockwise when you hold the inner race, that would do it... I didn't think to mention that as a cause as there's usually no reason to take it apart and I don't believe you can install it upside down or backwards as an assembled component. I've also never installed it upside down or assembled it backwards so glad to know what happens when it's not correct.

 

[Starkworks]

Assuming the outer race is spinning clockwise instead of counter clockwise when you hold the inner race, that would do it... I didn't think to mention that as a cause as there's usually no reason to take it apart and I don't believe you can install it upside down or backwards as an assembled component. I've also never installed it upside down or assembled it backwards so glad to know what happens when it's not correct.

@NickTransmissions - I pulled everything apart initially not knowing what was looking for. When I reassembled, I installed the plastic cage upside down. Had no idea the notches need to be facing up. Geez lol. This has been a journey, but it’s all back together and running. Wasn’t able to get the TEHCM relearned. Shifts aren’t terrible. Seemed to get a bit better the more I drove it. Still going to look for someone local to properly program it.

But I do want to say, thank you! Without your videos and recommendations here, I would be stuck. I knew it was going to be a journey with my first rebuild.

 

[NickTransmissions]

@NickTransmissions - I pulled everything apart initially not knowing what was looking for. When I reassembled, I installed the plastic cage upside down. Had no idea the notches need to be facing up. Geez lol. This has been a journey, but it’s all back together and running. Wasn’t able to get the TEHCM relearned. Shifts aren’t terrible. Seemed to get a bit better the more I drove it. Still going to look for someone local to properly program it.

But I do want to say, thank you! Without your videos and recommendations here, I would be stuck. I knew it was going to be a journey with my first rebuild.

You're welcome! Glad you got it back together and running again, man. The TEHCM will eventually relearn itself and adjust to your driving style.

 

[alpha_omega]

@Starkworks -

6. If all of the above is done and you still have the same problems, replace the TEHCM - a brand new one from General Motors will run ~$1,050 plus core and programming.
- Sonnax reman TEHCMs are $550-$600 plus core and programming
- Street Smart Transmissions remans are $550-$650 w/programming (you give them your VIN so they program it to your vehicle)

Do you recommend one of these options you listed over the others?

GM (OEM)
Sonnax
Street Smart

 

[alpha_omega]

@NickTransmissions - I pulled everything apart initially not knowing what was looking for. When I reassembled, I installed the plastic cage upside down. Had no idea the notches need to be facing up. Geez lol. This has been a journey, but it’s all back together and running. Wasn’t able to get the TEHCM relearned. Shifts aren’t terrible. Seemed to get a bit better the more I drove it. Still going to look for someone local to properly program it.

But I do want to say, thank you! Without your videos and recommendations here, I would be stuck. I knew it was going to be a journey with my first rebuild.

Thank you for posting your journey. Your humbling experience helps those who might be on the fence about tackling a project like this. We all start somewhere. This is no simple task either, so you should be proud and give yourself plenty of credit. Third times the charm. Ha! Hopefully Autel gets you taken care of so you’re all set for the next one. Nice work.

Next time you’ll have to take photos or it never happened.

 

[NickTransmissions]

Do you recommend one of these options you listed over the others?

GM (OEM)
Sonnax
Street Smart

GM new.