BD's design deflects the oil back onto the ring gear and into the pinion gear for cooler longer life. Other differential covers are large and bulky resulting in lubricating oil being flung off the ring gear causing addition heat and/or wear.. Other differential covers are large and bulky resulting in lubricating oil being flung off the ring gear. BD's design deflects the oil back onto the ring gear and into the pinion gear for cooler longer life.. Differential Cover; Rear; w/AAM 14 Bolt; Incl. Differential Cover/O-Ring Gasket/Bolt/Washer/Drain Plug;. BD Differential Cover, Rear - Dodge 2013-2018 2500 AAM 14-Bolt w/RCS (Rear Coil Spring). Deflects oil back onto the ring gear and into the pinion gear for cooler longer life. BD Differential Cover, Rear - Dodge 2013-2018 2500 AAM 14-Bolt w/RCS. BD Diesel Differential Cover - 13-18 Dodge 2500 AAM 14-Bolt w/ RCS. Extra Capacity Sump Located At Bottom For Gears To Pick Up Oil. Deflects Oil Back Into Pinion Gear For Cooler Longer Life. Gasketless cover has integral re-usable Viton O-Ring. Gasketless Cover Has Integral Reusable Vinton O-Ring. Stainless steel allen head cap bolts, fill plug. Engineered Cover Design Keeps Oil On The Gears. Stainless Steel Allen Head Cap Bolts Fill Plug. 36 Month/150000 Mile Limited Warranty. Deflects Oil Back Onto The Ring Gear. DIFFERENTIAL COVER DODGE 2013-2018. Internal And External Cooling Fins. AAM 14-Bolt with Rear Coil Spring. Magnetic Drain Plug. DIFFERENTIAL COVER

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