700r trans help needed

[sandm2001]

Hey guys, just had my 700r trans rebuilt for my 1988 chevy 4x4 k1500. the problem is after we put it back in and filled it with fluid when you pull it in gear it takes it a few to grab. the fluid level is full on hot and there is no leaks anywhere. also when you try to drive it it doesn't respond it acts like its slipping really bad. we set the detent cable to the specs that was said to use.does this problem sound more like a valve body issue or a seal wasnt put back right in the inside? any help would be appreciated.