while backing up my driveway my front tires get cought on the lip of the sidewalk, so I have to give it a little more gas to get the front tires over the lip, when I do that I keep getting a popping noise out of the rear end. Could this be the anti slip locking in? Any comments?



2005 2500 CTD, Leveling Kit, 305/70/17 Mtr, Rhino Liner, Leer 100xl

 

A properly working anti slip shouldn't make any noise at all. I'd check the fluid level in the rear end. It should be right at or a 1/4" below the fill plug.

 

Take the service mgr for a ride and demonstrate the noise for him. Sounds like you've already determined how to make the noise. Could it be something loose in the suspension instead of the pinion?
Nat
By the way, welcome aboard!

 

I have the exact same problem, but I can't get it to make the noise whenever I want, it only happens randomly when I give it a lot of gas backing up. I've already tightened all the rear suspension bolts excepts for the upper shocks mounts. It's definately not coming from inside the diffo.