Products Showing Parts for — {{ }}

No Results Showing Parts for — {{ }}
USD 270.75
Part #: MHAA14-11.5

Mag-Hytec AA 14-11.5 Differential Cover

2003-2013 Dodge Ram 2500* | 2003-2018 Dodge Ram 3500*| 2001-2018 GM 2500HD/3500HD
Part #: MHAA14-11.5
$ $270.75
Our Recommendations Compatible Products
Scroll to View More


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 AA14-11.5
  • Manufacturer Name Mag-Hytec
  • Shipping Weight 15.00 lb.
  • Shipping Length 13 in.
  • Shipping Width 14 in.
  • Shipping Height 4 in.
  • Warranty Yes
  • Warranty Info Limited Lifetime
  • Prop 65 WARNING: Cancer & Reproductive Harm -


Unique design
Location: Santa Rosa Ca
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.
2012 ram 2500 4x4
Location: california
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
Location: Oregon
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!
See More          
Add A Review

Include Your Order Number For a Chance to Win a $100 Gift card

Customer Photos

Customer Photos

See what others built Submit your photo

Questions and Answers

Ask XDP a Question about this product (Allow 24-48 hours for reply)

Most Popular Questions

Total capacity 8 quarts, what is the actual gain over stock cover?
View Staff Answer 

Your stock 11.5 differential takes about 4.5 qt’s. This Mag-Hytec AA 14-11.5 differential cover will take approximately 6 qt’s. to fill the bottom of axle tube (lower line on dipstick) and 7.5 - 8 qt’s. to the bottom of axle (top line on dipstick) . YOUR OIL LEVEL SHOULD BE BETWEEN THESE LINES

Where can I buy a replacement dipstick for this cover?
View Staff Answer 

This is not something that can be purchased through our website, but please contact one of our Performance Specialists at 1-888-DIESEL-4 and we will gladly assist you.

This is a standard 3 pin configuration designed for use on all Mile Marker Winches. (If your control box has any other pin configuration other than this, please contact Mile Marker’s Tech Department at:(800) 886-8647 to confirm fitment.)

Click Here

Will this diff cover allow me to keep my full-size spare tire without rubbing?
View Staff Answer 

The MAG-HYTEC AA 14-11.5 DIFFERENTIAL COVER will not interfere with the factory spare tire tire. However, if a larger then stock spare tire is used, there may be some issues with fitment.

can i use on my sierra with spare in place foremost, I want a cover with a temp sensor. additional capacity if possible, but I want to keep my spare in factory location.
View Staff Answer 

The MAG-HYTEC AA 14-11.5 DIFFERENTIAL COVER will work in conjunction with the FACTORY spare tire.


Enter the code at checkout and a 10% discount will be applied to your order.


Valid for all orders over the phone or online, *excluding the manufacturers listed in the company policy. You will still receive FREE SHIPPING on purchases over $50! This promotion is valid now - 5/28/19 only.