Mag-Hytec AA 14-11.5 Differential Cover

2003-2013 Dodge Ram 2500* | 2003-2016 Dodge Ram 3500*| 2001-2016 GM 2500HD/3500HD
XDP Part Number:
$5 Price Beat Guarantee
The Mag-Hytec AA 14-11.5 Differential Cover adds styling, function, and protection to the rear end of your GM 2500HD/3500HD or Dodge Ram 2500/3500. This heavy-duty differential cover makes it easy to do fluid changes with its built-in magnetic drain plug, oil dipstick to check fluid levels, and an o-ring gasket to provide a leak free seal. Built from aircraft grade aluminum, this differential cover features 303 stainless steel hardware and comes ready for installation on your truck. Requires allen key wrenches for installation and service. 


  • 8-Quart Total Capacity
  • Finned Aircraft Aluminum Housing 
  • O-Ring Gasket, No Sealant Required
  • Pre-Drilled & Tapped 1/8" Sender Port 
  • Magnetic Drain Plug & Aluminum Dipstick 
  • Routine Lube Maintenance Without Removing Cover! 
  • Limited Lifetime Warranty On Cover, 5-Year On O-Rings
Note: This is the correct cover for your 14 bolt - 11.5" differential, even though there are only 12 bolt holes. The top and bottom bolts have been removed for the drain plug and temperature sending unit hole.

Ram Application Notes*:
Fits Ram models with leaf spring suspension only. Will not fit late model trucks with factory coil springs or airbag suspension. If you have the coil spring rear suspension, please see the AA 14-11.5 CS Differential Cover below. 
Mfg. Number:

Customer Reviews - Include your order number for a chance to win a $100 GiftCard

(124 Ratings, 6 Reviews) Average Rating:
Unique design
Jeff (Santa Rosa Ca) 1/20/2016 6:36 PM
Mag-Hytec created a designe to fill the cover and axle tube higher than the original fill level. The amount of fluid with the stock over is 9 pints. I bought a BD cover (they tell you it doubles the amount)It increased 1 pint, to 10. Mag-Hytec increases 7 pints. With a total of 16 pints. The fill hole is at the top, with a dip-stick. No other cover maker does that. Adding 1 pint to 9 hardly seems worth it. Adding 7 to 9 does. I talked to several guys that have them. There is no down side to adding that amount of fluid. And there seals have been holding fine.
Great and Reliable Product, Outstanding Quality.
Marian Rizan (Clearlake, CA) 9/16/2015 3:37 PM
I have purchased Mag-Hytec 3 times in the past for a different trucks that I use to own, including my last 2014 Ram 3500 4x4 6.7L. I have installed this AA14-11.5 also on my previous 2009 GMC Sierra 2500HD and have been very pleased with the quality all over.. No leaks whatsoever in any of these previous installations. so I recommend this product 100%. Now, for the front differential cover the Mag-Hytec I wish the same product would be the same happy ending, but what I heard from many people then the front it does not fit unless you will experience some rubbing from the turning front tie rod. I wish they would have pay more attention and make it fir perfectly without any of this touching problems. I also wish that the Mag-Hytec reduce the price for the returning customers more often..
2012 ram 2500 4x4
mike (california) 12/16/2014 9:56 PM
Did not fit. The tie rod damper plate bolts rubbed against the front of the cover gouging it. Hytech mags solution was to rotate the damper plate 180 degrees away from the cover. Won't wor due to the design of the tie rod. New design needed.
Excellent product
Mike (Oregon) 2/23/2014 10:19 PM
On my 2010 Dually, perfect fit, having a dipstick is great. Adding a diff sensor for temp. Amsoil severe gear oil runs great and dont stink like normal gear oil, a simple but happy + for me. You wont be dissapointed when you compare this to the stock one, well worth it!
bullet proof
kaydub292 (half moon bay) 9/29/2009 12:28 AM
this company has been around for a long time and there is a reason. they make a great product and stand behind it. this is my second one i have owned (two different trucks) and i have never had any problems with it.