D44 and Noises don't mix

As I start to roll forward I get an initial thunk. I guess that would be the proper way of explaining the sound. There are no other funny noises while I drive it is just on initial roll forward. Any ideas on what this may be?

 

doesn't a detroit locker make a noise like that?...do you have a locker in it?

 

lash set properly?

 

How's about U joints?

 

unless a detroit locker comes stock it does not have one... i do not know very much about axles and differentials but i am learning...

 

i checked those by hand and there is no play in them...

 

lash se????

 

Rear wheel bearings will make clunking noises when they are failing. U-joints, mounts, spring eye bushings, spring u-bolts ... lots of sources for noises.

 

I'd jack up the rear wheels one a time and do a hand wiggle test.
grab top and bottom and wiggle
bad bearing, broken wheel hub, loose axle nut, etc