: engine rev during braking

11-23-12, 09:51 AM
I have an 07 STS with performance package, I had to replace the rear diff bushing but noticed before the replace the engine revs when braking to slow down. After the replace it still revs when braking. Also noticed that when I first take off in the morning on colder days there is a little slippage. Could this be an electronics issue? or could it be the tranny just needs service? there is 127 thousand on the car.

11-23-12, 02:30 PM
It should downshift while slowing. There's some slippage in the program to make the shifts smooth. Excessive slip could be the torque-converter. Members report it as a common trouble-spot.

11-23-12, 04:54 PM
any idea on the cost of that?