Ball joints
 

So im looking at rockauto and they have ultra power balljoints for 5.75 for uppers and 6.38 for lowers. I know its definitely not somewhere to cheap out but what gets me is that they are the exact part number as the moogs i just put into my wrangler. Does anyone have any experience with these or have any insight into the matching part numbers?

Some parts have "universal part numbers" so you can see all the different brands of the same part that will fit your applications. I can guarantee they aren't anywhere near the quality of the Moog ones. In any case it really comes down to how you use your XJ. If you go offroading I really wouldn't buy the cheap ones. If not, and you're easy on your Jeep maybe it'll be fine. Just ask yourself "do I really want to save a bit of money only to have to redo them again in the near future?"

Spicer FTW!!

Poly bushings anyone?