I just paid a shop $600 to rebuild my 4 speed. I have been working on the car doing other things while the shop had it. Got the trans back in and it will not go into reverse. All other gears are working. Cannot even move the lever with it not connected to the shifter. Hoping for a little advice. Had the car running on jack stands and was able to see that the clutch is working and the trans shifts into all the gears fine, By tightening and loosening the nut which holds the reverse linkage in place ther is some movement of the lever but in both positions the car is still in neutral. Help???