I am putting in new universal joints in my driveshaft. As I was putting the new ones in I notice that they had inside grooves. I looked in the package that contained the new snap rings and it had 2 half moon snap rings for the inside groove I guess. Why would it only come with 2 of these. I am not sure where I should place these. My original universal joint didn't have any inside grooves. It just had an exterior snap rings. I just can't figure out why you would have 2 and not 4 on the inside if you were going to have them at all. Each cap has an inside groove. Thanks for your help, Jason.
nevermind, I just figured that the inside snap rings are for a different application or something.