Tranny issues please help!

Bcoenen · March 13, 2016

So I had recently just blown the transmission in my 2011 Sierra with the 5.3 and the 6l80e. Truck had 146k, big deal. Dropped tranny brought it to a builder got it rebuilt, he said there was a relearn or reflash they had to do after the rebuild so I put the transmission back in the truck and it wasn't even able to drive to its appointment to get reflashed, loaded it on a trailer brought it into him he could not reflash it because I had shorted out the techem in the tranny when improperly installed my radio the first time. He then replaced the techem, went to go program it again and couldn't get the speed calculated to my tire size like he said (I'm going 5 faster than speedo reads with 35s) he then got some new software or something and was able to make it work as he claimed, I got it back, speedo is still 5 mph off and it slips like crazy, he said it would have a 175 mile break in where it would slip until that was over. I now have almost 400 miles on it and it still slips and in fact with this warmer weather and the tranny getting hotter it is slipping more, the hotter it is the more it slips, but even when it is cold I cannot drive it even like normal because it will still slip, I NEED HELP! What do I do next? I can't keep driving it like this. I've tried anything and everything I can think of and it still hasn't got better, any input helps thanks!

Daryl LBZ · March 13, 2016

It would be my guess that the shop didn't rebuild it correctly, something is wrong. I would take it back to them, and tell them that you want it fixed because it is not working correctly.

txab · March 13, 2016

Back to the builder

Bcoenen · March 16, 2016

Sorry it took me so long to get back, haven't been able to get on here and check things out, I have an apt setup for this Sunday to drop it back off I'm making him fix whatever he did wrong because it is clearly something on his end that is not done right