U-joint
 

Hey guys,I've been replacing my darn rearmost U-joint alot,what do you all think the problem is? I mean like every 50-75k miles.
The others are all OEM,and they are fine 440k on the truck now......
Recommend a U-Joint? I've been putting the greasable ones on,and I even grease them from time to time:5:
I put a shitload of miles on,and half of the time I'm pulling a travel trailer,but seems odd that only the rear u-joint is giving up all the time.
(the yoke is good)

Sounds like you need to check the pinion angle. Any lift on this truck or is it stock height. If your pullin alot it don't take the angle bein off by much to stress that joint out.