Daddy mack

I have a 6 speed automatic transmission that when I drive normally shifts fine with no slippage. When I go WOT sometimes the car feels like it hangs up on shift and if I let up on gas a little shift completes. Is the transmission screwed or is there something I can try to fix this like possibly changing the fluid?

C6ToGo

My 07 slipped hard one time when I gunned it cold. I researched and found this. Not sure if it applies to you.

https://www.corvetteforum.com/forums...ip-4395-a.html

I don't WOT anymore until trans is warm. Haven't seen problem since.

clydee

the car is prob confused what your trying to do and when u let the gas off a little it realizes that your prob done ripping it and shifts. normal id say. it was trying to hit redline before shifting is my guess until u let off the gas.

Landru

Sure would help knowing MY & mileage.

IF a momentary slip, RPMs jump w/o movement, could probably use a fluid change. Internal turbins need good, unburned fluid for proper operation & when fluid's worn-out/burned, discs slip.
Worn neglect fluid burns discs, then it's new tranny time.

If first time it's being changed + >100K, DO NOT flush.
Drain as much out as possible, refill w/ fresh.

High mile never maintained ATs accumulate sludge in all valves/passages/corners/crannies, and there're many.
New xmission fluid's actually an excellent cleaner, but the last thing one wants is to disturb the most imbedded debris.
It'll only foul-up xmission fluid passages.
*A few excellent uTubes detailing this matter.

Had drain/refill shtick done on our CTS4 w/ 150K after it began slightly slipping. It's like new, now.

If not slipping, it's something deeper.
Or as others have said computer's slow anticipating what to do taking a second or 2 to respond. Might be able to tighten-up shift time w/ a tune, maybe ask RPM?

Last AT I owned was in a '69 340 Dart, magnificent 727.
All mechanical & perfect at 'anticipating', every time.
These electronic versions not so much, based solely on reading owner comments.

Just be glad it's not a A8.