Ok guys i have another question. the trans in my car(only does this sometimes) when i floor it the trans downshifts and the engine will rev all the way up to 4500 and then it will shift and haul ***. is this normal operation? tranny was rebuilt 20000 miles ago and i haven't been hard on it except for the occasional race. i woul love to fix this cuz its damn annoying and slows the car down alot. thanks for any input you can give me.