Need tranny help please
This morning on my way to work I was driving along at 55mph and all of the sudden my converter unlocked and tried to lock back up 3 times in a row. It finally locked back up, but the RPMs went up and stayed a few hundered RPMs higher than normal. I caught a red light shortly after that, and when I rolled out at the green light the car bucked a little, and made some racket like a poping/grinding noise and then caught gear. It took longer than normal for the verter to lock up once I got going too. When I got to work, I checked the tranny fluid and it seemed fine other than needing to be changed. I checked every thing out again at lunch about 10 minutes ago, and that same poping/grinding noise is coming from the converter/tranny area under the car. I did a short test drive, and it free reved on take off untill about 3000 RPMs a couple of times. The lock up was acting wacko again as well. On the last part of the drive though, everything was acting fine. Anyone have any idea what could be going on and what I can try myself to fix it?
Oh yeah, the car is a 01 Z with a Yank ST3500\B&M cooler\lid\FTRA\loudmouth...........thanks in advance for any help or advice.

