I think I finally grinded my gears for the last time. My GSR tranny won't shift in fourth gear. All the other gears are fine. When I try to shift into fourth, there is no grinding or any noise. It just will not go into fourth no matter how hard I try. Does anyone have any comments or help to offer? I think I might have to start shopping for the best deal I can find on a new B series hydro tranny.