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Vile, I had a new u-joint installed last summer when I went through my rear diff debacle but when I went to install the new diff I bought, the u-joint caps easily fell off. Well, one did and some of the needle bearings came out. I carefully retrieved all of them and reinstalled them the right way so there wasn't a problem. But there were no clips to hold the caps on, and again, this was a new joint.