'92 Z34 Tranny problem?!?!? (Help Quick)

OK so, ... i bought a lumina z34 3.4L its 4matic i think it should be a 4t60-e transmission beats me im not to brite with cars yet i feel something about this one i love it! .... anyways i replaced the engine with one that has only 75000 km it worked fine for several month now i think my transmission is done when put in drive it accelerate into first second and then it sticks it would go higher but when i punch it it will rev high and leap into 4th it feels like... i have been reading the the 4t60-e transmissions have a bad ground or something with the solenoids i think this might be the case but if anyone has suggestions or comments that would be a BIG help and if i can fix the soleniods on my own please help but be detailed please and thank you

:banghead::screwy::popcorn: