I swapped in this auto trans when I did the Z6 swap, it seemed okay for about a week. Now it feels like its slipping all the time. If I let off the gas and coast, then get back on the gas even lightly, it drops down two gears and starts hauling ***. It will go all the way to 5 grand or more then shift, with light throttle, then in second gear shift at 2500. It feels like it downshifts before upshifting, and it is doing this constantly. What's wrong with this thing?

It has a TCI high stall converter BTW.

Please no "convert to manual" comments, they aren't helpful. Thanks.

 

maybe your tcu has gone bad