I have checked out just about all the topics on these forums and i have found nothing that has to do with my wierd transmission, ive got a 93 sle with 145 on it and when i accellerate to fast, the trans cant catch the next gear and just revs. In other words, it drops out when it needs to shift and wont upshift. its a little tweaky when not accelerating. I have also noticed that when in park, the car moves back and forth a little. My friend said that more transmission fluid would fix this problem. Should I try to add fluid, or should i just rebuild the tranny. I just got this car and im trying to fix it up a little bit. I just wonder how long i would be able to have this car run without the fast transmission.

Check your tranny fluid level with the engine warm and idling. Where is the level? Is it pink and not burned smelling?

I fixed my tranny problem just last night. Mine would shift really bad if I was accelerating under light to moderate throttle. It would shift ok at steady speed or the harder I pushed the go pedal. Turns out my vacuum modualtor was bad. 12 or 13 dollar part. BUT, my tranny behavior was different than yours. Just something to think about. My old modulator had literally no tension on the pintle, it kinda flopped. It should be quite firm and hard to push in. I first supected my modulator because it would wiggle quite freely when mounted even though the clamp was tight. It'* easy to take out, just one 13mm stud and a rubber vacuum line. Might be worth a look.

Sounds like your second gear clutches are burnt up. Adding fluid will only hurt you if you're at the proper level already. CHANGING fluid may help for a short time if my diagnosis is correct.

Mine was doing that just before it went only it would catch, just slipped first. A flush bought me a month of light light driving.