I've been having an issue with my car shifting hard at times.. It'll get warmed up, start shifting hard, I'll pull over.. shut the car off.. wait about 30seconds, and drive off like it never happened.

I've been reading up on this issue, and it seems like a number of grand prix owners have had this exact issue. I've also read that a probable fix for the problem is the pressure control solenoid being replaced.

My question is... are any of you familiar with this problem I'm having, and did replacing the pressure control solenoid fix your problem?