'm having problems with my 722.4 transmission not wanting to shift unless I release the gas all the way. I just rebuilt the transmission and I have no idea what it could be. I've adjusted the bowden cable and it makes no difference. If I drive with the throttle at 20% it will just rev until I let go off the throttle then it will shift. Any ideas on what it could be? Vacuum modulator seems fine cause when I let off the throttle it shift smoothly. Any info would be greatly appreciated