can anyone tell me what is going on I have a clack sound from the rear axle after shifting from park to drive and accelerate there is a clack sound which is loud and happens once until I put it in reverse and makes that sound again . So far I have changed the brake shoes and loosen the hand brake but it still makes the sound and it is doing my head in . I'm starting to think it could be the rear axle shaft or diff or maybe its the little parts in the rear hub below of the brake shoes