Just running down the road this morning after getting loaded, started hearing a thumping sound, above 45 mph said to myself that sounds just like the last time the rear end went out, but t only has 80,000+ mi has to be the rear rear I have never changed it. Dropped my trailer on the side of the road bobtailed home jumped out and took a sample on each rear while hot and stirred up sure enough front rear had the metallic shine to the oil. Pisses me off because the warranty is timed and with a year and a half changing it over to a electronic engine its well out. Good news is I found a set of 3.70 instead of my 3.42 help me go up hills better but I will lose my 90+ mph. Get this thing back on the road and I need to start looking for a cut off with Eaton rears and leave these Rock wells for the Volvo/Frieghtliner guys. LoL.