ATS 4029156248 Protector Rear Differential Cover

2001-2015 GM Duramax | 2003-2015 Dodge Cummins* (with AA14-11.5 Axles)
ATS Diesel
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The ATS 4029156248 Protector Rear Differential Cover for your 01+ GM 2500HD/3500HD & 03+ Dodge Ram 2500/3500 fits on the 14 Bolt - 11.5" American Axle rear axle on your truck. Built from durable aluminum, this rear differential cover allows for larger oil capacity for optimal gear lubrication and cooling.


  • Optimal Gear Lubrication
  • Black Powdercoated Finish
  • Drain Plug For Easy Fluid Service
  • Built-In Heat Sink For Better Cooling
  • 2.5 Quart Increased Capacity Over Stock
Note: This product will only fit on 2013+ Dodge Cummins models with a rear leaf spring suspension. Due to clearance issues, this cover will not fit on rear coil sprung applications.

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(83 Ratings, 2 Reviews) Average Rating:
07 Dodge 2500 HD
Jeff Bradshaw (Carson City, NV) 9/21/2014 7:09 PM
Great product. Easy to install and looks even better! Took about 7 quarts of 75W-90 Amsoil severe gear. Thanks again XDP.
04 Duramax 2500HD
Zak (Greenfield Center, NY) 2/15/2014 8:58 AM
Perfect fit on the differential housing. Only problem was the brake line tabs, which only required a little modification to get them to fit. Overall, a great product. Solidly built, flawless machining, great looks.