Why does the rear universal joint wear out so often?
Often it is found on a u-bolt style end yoke. If the u-bolt is over-tightened, it will distort the bearing cap, causing premature wear of the u-joint. This can be verified if the two bearings in the driveshaft yoke are okay. If damage to the yoke was not noticed during replacement of the first universal joint, the next u-joints will not last as long as they should.
