Ok, so i put a new tranny in my car (well used, but a gm rebuild with 15 on it and a 2400 stall that was used with it). anyways i was driving it around and it seemed pretty normal the first couple time i took it out. anyways, today it was acting weird. it had 3 shifts, but they were all over by 30 mph. and all the shifts were only dropping the rpms by like 50. so it would shift at 1500 and drop to 1400-1450ish. and by 30 i was in the 4th gear avaiable and no more shifts all the way up to 60 (im guessing that was od then, but the rpms were going way up and it seemed like it should have shifted again). anyways, i readjusted the tv cable, same thing, 3 shifts, all small rpm drops, and all occured by 30 mph. what is wrong here? i need any help i can get, thanks a lot.