Remove the clamps for the lower boot slide it up the axle push the joint in inside the edge of the "cup" there is a circlip like a wire that runs around the inside that holds it from sliding out. Remove that clip with a screw driver just pry it out. Then slide the cup off you will see the cage with all the ball bearings on it if one falls out they just snap back into the cage. on the end of the axle ...the part with cage on it the is an outter snap ring pop that off and the cage and bearings will slide off and all that can be replaced. If you need help you can call me I can PM you my number