[SSC's76]

the 700r4 is a good transmission if properly built. the shifting issue with yours is related to heat. either the valve body is not tight possible gasket failure or the case part of the valve body could be warped. its had to say without pulling it apart. either way it needs gone through. 700r4's are kinda crap from the factory pre 88 are the worst of the bunch 88 and up there were several improvements made like an auxiliary valve body and some other improved components. if you get a rebuild try an get an 88 or newer core and have it rebuilt. there were actually 3 different 700r4 transmissions made prior to the 4l60. you don't need all the hardcore parts but most builders will use them rather then the stock parts which drives the rebuild prices up. a transgo shift kit a nice 2000 stall converter and an external cooler will have it shifting perfect and running cool for a long time. I don't suggest jasper I've been to their plant and I've had issues with them for warranty engines not to impressed.