stripped the rear diff (not the fist time) and when doing the usual rebuild it seemed extremely tight and notchy, i have done all the normal stuff, moving the shim to the other side, no shim, lessening the yoke a little and its still notchy
the input gear, ring gear and yoke are all new, the binding is in the input and ring
the input gear, ring gear and yoke are all new, the binding is in the input and ring