Originally Posted by jeepdaddy2000
Not an uncommon issue. I have not only seen yokes wear, but slip joints get so bad that they ratchet under load. My daughters 8.8 has a worn yoke that looks much like your vid. Know that the yoke is made of softer metal than the pinion, so I wouldn't get too excited about a R+P swap yet.
As for the buzz, might check the rest of the drivelines/front axle for fazing, wear, or bad u joints.
Excessive lift can cause vibrations as well.
Well that's good to know. I've still have yet to chase down the vibration, but I've already balanced the DS twice, checked and rechecked angles (with a number of variations) and checked for movement, etc. So I'm not sure what it could be. I still have to do a tire rotation, though. It doesn't feel like that, but I'm usually wrong, ha ha.
The front DS just got put back in and is giving me some major vibes now too (only 3" lift and just rebuilt/balanced the shaft) so I might just break my promise to myself and buy a yoke for the front. Converting to u-bolts would be nice anyhow.