Sorry to use the "clip" word. That is the common phase used for the Trac Lock keepers falling out on '02 and up models. It's a big problem with '02 and up Rams with the 9.25 LSD diff. I have a '02 which is out of warranty and am looking at least a $1,000 repair bill. That's with me soursing the parts myself and the labor to install the parts. Glad to hear the Duro has no LSD.
BTW, the 9.25 indeed uses C clips to retain the axle, or it does on Rams anyway. Bob