I was told the OD sprag broke. builder covered parts labor and shipping. Should have it fixed next week.... its on the way back

 

Awesome, did you have him set it up the same way it was before?

 

Cool, glad to hear that he stepped up and took care of you.

 

It's actually a roller-clutch in the overdrive, not technically a sprag. The problem with pre-2001 4L80-E overdrive roller clutches is that the rollers tend to skew minimizing their contact which causes the rollers to wear unevenly. They eventually let go. For the 2001 model year the entire assembly was redesigned with rollers captive in little shoes that keep them square. This assembly is available as a retrofit into all older model 4L80-E transmissions. Unfortunately, it is not inexpensive.

 

Ahh, I think thats what he referred to it as...

Thanks for the info, yet again James.

Im back with the same unit, same case. It is still vac modulated. He said too many tuners get too carried away with the shift pressures....

Im hoping this was from a bad rebuild. I mean it lasted two days, not much WOT behind a turbo 4.8L....

 

I think you have the worst transmission luck then anybody I have ever know.

 

Did you ask him if it came with a filter this time....