Find the right Gear Oil you need when installing a differential cover, or servicing your axle on your 2011-2016 Chevy/GMC 6.6L LML Duramax. With 85W-140, 80W-140, 80W-90, 75W-140 or 75W-90 available, you'll find the lube you need for your application. Discover the large array of synthetic blend, conventional, and full synthetic lubes we offer. XDP offers Nitro Gear & Axle, Motorcraft, AFE, Lucas Oil, and Royal Purple gear lube.