727 Trans shift help ASAP

Thats odd. Can you get it to shift at all at 1-2? 6k? My tf-2 would do that to me when i put shorter tires on. with my 28s it'll shift when i want, 26s ill shift at 5500 and itll wind to 6k and shift. Govenor must need more mph to make the upshift. Try backing off your kickdown linkage some and see what happens. Your govenor, which is driven by the output shaft, needs to have enough pressure to overcome the throttle valve (kickdown) to make an upshift. Lowering that TV pressure will allow you to not have to as much mph for the governor pressure to overdue the TV.