Any Ideas?

[LittleBeast]

If it is lifted it is probably just the change in pinion angle finally taking its toll on your u-joints and pinion seal. If you have 33" tires you probably have a lift. If you have a lift your pinion angle is NOT correct. If your pinion angle does not match the angle at the transfer case you will eventually smoke your U-joints and need to rebuild your driveshaft. Buying adjustable lower links will allow you to lengthen your lower links and put the pinion back into the correct angle after lift.

[UWVX89]

If it is lifted it is probably just the change in pinion angle finally taking its toll on your u-joints and pinion seal. If you have 33" tires you probably have a lift. If you have a lift your pinion angle is NOT correct. If your pinion angle does not match the angle at the transfer case you will eventually smoke your U-joints and need to rebuild your driveshaft. Buying adjustable lower links will allow you to lengthen your lower links and put the pinion back into the correct angle after lift.

Never really thought about that. I think I should have it all looked over by someone who knows more than I do on this matter.