what kinda joint is it , Rzeppa ( with boot off, it looks like kinda a star with about 6 balls lined on the outside), Tripod closed tulip (has 3 posts each with a roundish roller and inside the roller are needle bearings)
those are the main two types there are several sub cat's but if you know what type it is I can give you general instructions for disassmbly and reassembly, just replace what is ****ed up. They are really simple actually