FAST DELIVERY
AAM 40005967 Differential Cover Gasket - GM/Ram 11.5-inch Rear Axle
100% ORIGINAL AND QUALITY
EASY RETURN
- Description
- Fitment
- Warranty and Refund
- Reviews
The American Axle & Manufacturing 40005967 is a one-piece, rubber coated metal cover pan gasket engineered for GM 11.5-inch rear axles (2001-2018) and Dodge/Ram 11.5-inch axles (2003-2018). Its rubber coated metal construction is designed to help seal your differential cover against gear oil leaks during routine maintenance or cover replacement. The one-piece design simplifies installation compared to fussy multi-piece or cut gaskets, helping you get the job done without extra trimming or alignment guesswork. Backed by AAM's direct fitment coverage across 116 verified vehicle applications spanning Chevrolet, GMC, Dodge, and Ram trucks, this gasket is built to match OE cover geometry for the specified 11.5-inch axle housings. Whether you're servicing a Silverado, Sierra, or Ram 2500/3500, this gasket is a straightforward, purpose-built replacement for your differential service.
Notes
Cover Pan Gasket, GM 11.5-inch Rear Axle 01-18, Dodge/Ram 11.5-inch axle 03-18
Features
- One-piece design speeds installation and reduces the chance of leaks from misaligned seams.
- Rubber coated metal construction is built to seal against gear oil leaks at the cover.
- Verified fitment across 116 applications for GM and Ram 11.5-inch rear axles.
- Covers a wide model range, 2001-2018, for long-term parts availability planning.
- Backed by American Axle & Manufacturing, a driveline-focused specialty manufacturer.
Application Summary
2001-2003, 2005-2006 Chevrolet Silverado 3500 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS2001-2004 Chevrolet Silverado 2500 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2001-2004 GMC Sierra 2500 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2001-2006 GMC Sierra 3500 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2001-2006, 2008-2010 GMC Sierra 2500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2001-2011 Chevrolet Silverado 2500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2003 Dodge Ram 2500 Van 5.2L 5211CC 318CID V8 OHV 16 Valve Naturally Aspirated GAS
2003-2004, 2006-2008 Dodge Ram 3500 5.9L -CC 359CID L6 OHV 24 Valve Turbocharged DIESEL
2003-2005, 2007 Dodge Ram 2500 5.9L -CC 359CID L6 OHV 24 Valve Turbocharged DIESEL
2004 Chevrolet Silverado 3500 6.6L 6599CC 403CID V8 OHV 32 Valve Turbocharged DIESEL
2005, 2009 Dodge Ram 3500 5.7L -CC 345CID V8 OHV 16 Valve Naturally Aspirated GAS
2006, 2008-2009 Dodge Ram 2500 5.7L -CC 345CID V8 OHV 16 Valve Naturally Aspirated GAS
2007 Chevrolet Silverado 3500 Classic 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2007 GMC Sierra 2500 HD Classic 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2007 GMC Sierra 3500 Classic 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2007, 2011, 2014, 2016 GMC Sierra 2500 HD 6.6L 6599CC 403CID V8 OHV 32 Valve Turbocharged DIESEL
2007-2011 Chevrolet Silverado 3500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2007-2011 GMC Sierra 3500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated GAS
2010 Dodge Ram 2500 6.7L -CC 408CID L6 OHV 24 Valve Turbocharged DIESEL
2010 Dodge Ram 3500 6.7L -CC 408CID L6 OHV 24 Valve Turbocharged DIESEL
2011 Ram 3500 6.7L -CC 408CID L6 OHV 24 Valve Turbocharged DIESEL
2011-2015, 2017 Ram 2500 5.7L -CC 345CID V8 OHV 16 Valve Naturally Aspirated GAS
2012-2013, 2015, 2017-2018 GMC Sierra 2500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated FLEX
2012-2013, 2017-2018 Chevrolet Silverado 3500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated FLEX
2012-2013, 2017-2018 GMC Sierra 3500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated FLEX
2012-2015, 2017-2018 Ram 3500 5.7L -CC 345CID V8 OHV 16 Valve Naturally Aspirated GAS
2012-2018 Chevrolet Silverado 2500 HD 6.0L 5967CC 364CID V8 OHV 16 Valve Naturally Aspirated FLEX
2014-2016 Chevrolet Silverado 3500 HD 6.6L 6599CC 403CID V8 OHV 32 Valve Turbocharged DIESEL
2014-2016 GMC Sierra 3500 HD 6.6L 6599CC 403CID V8 OHV 32 Valve Turbocharged DIESEL
2016 Ram 3500 6.4L 6424CC 392CID V8 OHV 16 Valve Naturally Aspirated GAS
2016, 2018 Ram 2500 6.4L 6424CC 392CID V8 OHV 16 Valve Naturally Aspirated GAS
Specifications
- Brand: American Axle & Manufacturing
- Part Number: 40005967
- Part Type: Differential Cover Gasket
- GTIN: 00840382502750
- Package Dimensions: 13.5000 x 13.0000 x 0.1100 IN
- Package Weight: 0.1500 PG
- Package Quantity: 1 EA
- Bolt Hole Quantity: 14
- Configuration: One Piece
- Grade Type: Performance
- Material: Rubber Coated Metal
Warranty
- Warranty Type: Limited
- Warranty Duration: 1X Years
- Warranty Description: Limited, see demandaam.com
Returns
30-Day Money-Back Guarantee
We want you to be completely satisfied with your purchase! If you are not happy for any reason, you may return the item within 30 days for a refund, minus shipping fees, provided that: The part is brand new, uninstalled, and undamaged in any way.
To initiate a return, please contact us or email support@mizumoauto.com for a Return Authorization Number (RMA) and the return shipping address. Returns without an RMA number will be refused and returned to you at your expense.
Return Requirements:
- Items must be securely packed in the original manufacturer's packaging.
- All original materials must be included, such as hardware, manuals, protective caps, wrapping, and instructions.
- You must obtain and retain the tracking number for your return.
Non-Returnable Items:
- Piston rings, main bearings, and rod bearings are non-returnable if the manufacturer’s seal or shrink-wrapped plastic has been opened. No exceptions—this ensures the integrity of the parts you receive.
We are not responsible for lost or damaged returns. If your return is lost or damaged during shipping, a refund cannot be issued, as the item cannot be resold or returned to the supplier. Please file a claim directly with your shipping carrier for reimbursement.
Refunds are processed within 1-2 business days after we receive and inspect the returned item. Please allow this processing time before inquiring about your refund status.
Warranty
Mizumo Auto provides a 90-day Limited Warranty against defects in workmanship and materials under normal service conditions, effective from the original delivery date.
This warranty is non-transferable and applies only to the original purchaser. Coverage is limited to the replacement or refund of defective products.
Exclusions:
The warranty does not cover labor costs, damage resulting from accidents, misuse, alterations, or unauthorized modifications, as well as additional expenses such as towing, fluids, oils, car rentals, and any other parts not included in the original purchase.
Warranty Claims Process:
- All warranty claims must be pre-authorized and returned prepaid to Mizumo Auto for inspection and approval.
- No exchanges will be made for products that have been damaged, misused, or improperly installed. We strongly recommend professional installation.
- The buyer assumes all risk of damage resulting from improper installation.
All disputes related to transactions shall be resolved by a court of competent jurisdiction in Los Angeles County, California.
Shipping
We offer Free UPS Ground or USPS Ground Advantage shipping within the continental U.S. (48 states).
Shipping to Other Locations:
A delivery surcharge applies to shipments to: Alaska, Hawaii, Puerto Rico, U.S. territories, APO/FPO addresses, Canada, and international destinations.
Order Processing & Tracking:
- Orders are shipped Monday through Friday, excluding holidays.
- Orders placed before 3:00 PM PST will ship the same day, unless unexpected delays occur.
- A tracking number will be emailed within one business day after shipping.
If you do not receive a tracking number, please:
- Check your spam/junk folder.
- If it's not there, contact us via phone or eBay message for assistance.
International Orders:
Import duties, taxes, and brokerage fees are not included in the shipping fee. Please check with your shipping carrier and local customs office regarding any applicable fees before placing your order.









