Yeah here we go. U-joint, axle etc could be anything. But it sounds $$$$. Time to get under again and start searching. Hope it is something easy. Let us know last time I heard something like that I was chasing a spare axle.
89 2.5 TBI, 4" RC lift, 1" Booms, SYE, Adams Driveshafts front and rear, Ford 8.8 with 4:88s, BFG 33X12.50X15, and a ton of other stuff.
AF Jeep Club Tail Number 184