i jus put a new trans in i cant get it to shift until i hit 3500 seems to shift a little sooner if i shift it manually is it my govonor or maybe stuck tv valve?

 

TV Cable might need adjusting try this......You could have a bad TV Cable (sticking or frayed). Look at it for obvious signs of this when the engine is off. Then readjust the TV like 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 that doesn't take care of it then you likely have hte common sticking TV Valve inside the VB. The best/true fix is the TransGo Shift Kit or Reprogramming Kit.

Per Transfix leo

 

What he said ^^.