Come to find out that none of the parts stores carry this gasket for my truck. Apparently it's a stealership only item. Unless you just want to go the "silcone" route. The part# is 5086767AC. My truck is a 2003 4x4 3500 SRW. I'm not sure if there is any variance from year to year. Hope this helps someone out.

 

I found them at O'Reilly Auto Parts. They had to look the part number up in the reference books under AAM Axles. They did not list the part in their computer for the 3500. Part# Fel-Pro 12579. Bit late - hope it helps!

 

I had the same problem. Mine had a tear. Couldn't fins it listed so I just cleaned everything up real good and used some Oil type RTV

 

I think most shops just use RTV.