Propshaft Wear:-
Propshaft universal joint wear and vibration is a problem on Land Rover vehicles, on lifted vehicles, this can be more of a problem as it steepens propshaft Universal Joint working angles to the point where they overheat and vibration problems can become an issue. Caster Correction also steepens UJ working angles so can cause more vibration and overheating problems, even lowered Defenders can suffer from vibration issues.
No prop shaft should be run for long periods with a steeper running angle of more than 5 degrees, anything above this angle used for long journeys will cause the UJs to overheat, the grease will dry up and cause premature wear. This is always a problem with Land Rovers. For example, if you are driving at 50mph at 2000RPM the propshaft is revolving 2000 times every 1 minute, the steeper the angle the faster the needles are revolving in the caps, this is why they overheat, on a Double Cardan at these speeds the ball in-between the 2 joints is also working hard and getting hot, eventually, it will cause the rubber boot over the ball to fail.