This happened Loud banging from my rear So I ordered a new set of spider gears. The Jeep parts are discontinued and anyone who has them thinks they are made out of gold and uh, can't be sold. So I had a choice of Richmond Gear ($100) and USA Gear ($200). The Jeep set comes with an assortment of washer/shims to measure and use the right one for proper side gear clearance. The Richmond set showed only two shims. I called and asked why everyone else showed a set of shims but the tech guy was not any help. I see they do sell the set of washers separately for $30. So I ordered the USA set which should have the washers and is forged (USA) vs cast (Richmond). Once I removed the spider gears I see the washers are worn so bad that one broke. The pinion gear shims are very worn too. The actual gears look OK but my calibrated eyeballs are out of whack these days. Why take chances. I think the shims wore so badly that the gears wore down as well. The ring and pinion set look good and the backlash is OK. Hopefully no other damage occurred. I am adding a screw-in fill port as well to replace the crappy plastic plug that always leaks. I seal it so it won't leak but then I don't check the oil enough. I will weld on an O2 sensor bung and use an 18mm x 1.5 plug to seal the hole. Now I can check the oil level properly.