I have a 2012 3500 Mega SRW 4wd. Hearing metal on metal and the truck pops when I put it into 4wd and turn even slightly. Think it’s slack in the chain of the t case among other things. My question is, with it being an automatic, is the rebuild kit an NP273? Anyone tried Rigid Axle rebuild kits? Drained and refilled the t case and added 1.5 qts to the front diff (I know...🥴) didn’t do any good. Should I just say forget it and rebuild the whole thing?