HELP! I have 700r4 off a 91 Camaro, rebuilt 500 miles ago that was I just put into my 84 Trans Am, the shifts from 1-2 are great but just slips while going from 2-3. The fluid is at a good level and not burnt, what could it be?

 

When does the slip occur, at part throttle? full throttle? let me know?

 

Evreytime it tries to shift from 2-3

 

Check fluid level and correct if necessary. Then do this:
To adjust the TV Cable skip the book method and do this: Press the 'D' shaped lock button on the adjuster and loosen the cable setting (The black housing that the metal cable is in will move forward). Now, have someone floor the gas pedal while you check to see if the throttle plate is open all the way. Usually they are off a little and will wiggle. Do whatever you have to do to get it open solid. Now, with the pedal still floored, press the 'D' button and pull the cable casing (the black tube) back as hard as you can (putting maximum tension on the metal cable) and release the button. You now have the engine, tranny and gas pedal all in sync at WOT. Mark the cable casing so if for some reason it gets moved you can know where to put it again. The problem with the 'self adjust method' is that it bends things and puts them permanently out of whack. It is also the full TV setting, which is theoretically what the GM method does.
If the TV is set correctly and the Cable is good, fluid is full then there is likely an internal problem that was not addressed/fixed at the time of O/H.

 

Ok, I have adjusted the t/v cable by means of the throttle on the carb, would that make a difference or should I try with someone giving it throttle with the petal? My fluid was a little low, would it make that big off a difference?

 

Low fluid can cause all kinds of problems. I am not clear if you adjusted as per directions?

 

Also check you pressures, you might have forgotten a seal (Possibly ) There's alot of seals in there, plus the pile of teflon seals that seem to get ripped up when installing the pump.

Hopefully it's a quick fix, I would avoid driving it until you get it fixed so you don't burn up your 3-4 pack...