I noticed a large hex bolt projecting backward on the RHS axle had loosened. (Sticking out about 1/2") I tightened it but it did not seat all the way. The low low gear came back but is both slipping and dragging. I suspect this bolt has to engage inside the axle, either a matng hole or groove and that I have lost some alignment. does anyone know what goes on inside the RHS axle? Jeff Nicklen