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- - rear end clunk (https://67-72chevytrucks.com/vboard/showthread.php?t=545420)

I have what can be described as a "clunk" in the 06 GMC. Happens only on the 1-2 shift. Feels like it's from the rear end. There is no gear whine or howl however. The truck has the 5.3, auto w/od, 4.10 gear with gov lock with 110,000 miles on it. I haven't looked at the ujoints yet. Any ideas?

Re: rear end clunk

Quote:

Originally Posted by Boog (Post 5621076)

Remove the driveshaft & lube the internal splines on the slip yoke....Retest.
Get back to me on what you find.

Inspect the U-loints while the driveshaft is out.