ok i might be traden my truck with a ton of miles for a 87 trans am GTA 5.7l 700r4 its in ok shape not rusty but some body damage minor but the guy is a tool and said it needs a trans cause it dont slam into 2nd gear hard i went for a ride and in just OD it shifted just fine through all 4 gears he told me on the phone that it you hold the pedal to the floor that it red lines till you take your foot off the gas then it shifts it seemed fine to me when he floored it all it did was spin the left tirenow i was reading theres a valve in the 700r4's that gets cloged up could that be the problem? or ne kind of advice please thank you