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SKU: R1412 GM / Dodge AAM 11.50 Differential Cover (W/Hardware)

GM / Dodge AAM 11.50 Differential Cover (W/Hardware)
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Purchase GM / Dodge AAM 11.50 Differential Cover (W/Hardware)
  • GM / Dodge AAM 11.50 Differential Cover (W/Hardware)

  • ★★★★★ ★★★★★ 3 reviews
  • Part Number: R1412
  • Shipping Weight: 16.00 pounds

  • $149.95

  • Add Lube Locker Gasket?:  
  • In Stock

GM / Dodge AAM 11.50 Differential Cover

Due to low demand these covers are made per order. Please allow 5 day lead time from time order is placed.

The differential cover is a 1 piece 3/8" (.375") plate steel cap bent 8 ways then welded to a 3/8" ring! The fill plug is a generous 1" ID for easy fill and oil level check. After welding the mounting surface is machined absolutely flat for a perfect fit!

You must verify what axle is under your vehicle as there are a few options from factory. This cover fits the below vehicles equipped with the AAM 11.5"

GM Duramax Years 11.5
  • 2001-2018
Dodge Years 11.5
  • 2004-2018

Write Review
★★★★★ ★★★★★
4.67/5 Stars out of 3 Reviews
King of Arizona? KOFA for short.
Perry (Prescott, AZ) | March 23rd, 2021
Mutilated the stock diff cover in CO mountains not long after buying a new Ram 3500 back in 2016. Got a temp repair up in Grand Junction. Actually I can't remember if I put another tinfoil OEM rear diff cover on or not? But ordered up a Ruff Stuff diff cover/boat anchor as soon as I could back in AZapped. No complaints and no leaks. In fact I hardly ever think about it! I only check in every few years to see if they have a front diff cover available so the truck can be balanced again ;)
Verified Buyer
GM AAM 11.5 Diff Cover
Joshua Salaets (Yorba Linda, CA, US) | May 8th, 2018
This diff cover is everything that I hoped it would be. Customer service was amazing along with the quick shipping. It took 5 days to make the diff cover (as it says in the product description) and was at my front door the next day. After opening the package and seeing it in person I was blown away with how sexy it was. Definitely a chick magnet and will increase your man hood by at least 3 inches. Overall, nothing but great things from this product and would recommend it to anyone.
Verified Buyer
AAM 11.5 Diff Cover
Jake Holcombe (New Bern, NC, US) | March 5th, 2015
I finally got myself one of these beauties! Ordering and shipping was quick and painless, as always. Shipping was done via USPS, which I prefer. Since I'm in NC and Ruff Stuff is in CA, USPS is MUCH faster than UPS. Everything I order is here in 2 or 3 days max. The diff cover was everything I dreamed it would be. Pure beef! 16 lbs of amazingness! I like that they spot face the cover so a washer or bolt head can sit flat and tighten up properly. The only minor thing I see is the lead in/lead out nub from cutting the flange ring wasn't ground off. Also, note that these axles are METRIC. I called to see about how long of a bolt I would need to use and was informed they come with 5/16-18 bolts that are 3/4 long. They are, in fact, M8-1.25 bolts. At least the GM axles are. I can't attest to that on the Dodge axles, but since they're made by the same manufacturer, I would safely assume that they're threaded alike. If I spent the 7.50 on hardware, I'd want the correct stuff.

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⚠ WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer. For more information, go to
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