I have no reverse after gearbox rebuild. Only things changed was bearings and seals. It does shift into reverse but it's a little hard to shift but nothing happens, the wheels wont spin. All the other gears work and shifts great. When I had the gearbox on the table it was hard to shift to reverse sometimes but when removing the selector detent on the reverse selector side it shifted to reverse great but with the detent in, it was hard to shift to reverse