BD DIESEL 1061825 REAR DIFFERENTIAL COVER AA14-11.5 DODGE 2003-2018 5.9L-6.7L CUMMINS / CHEVY 2001-2018 6.6L DURAMAX

Product Description

The BD DIESEL 1061825 Rear Differential Cover (AA14-11.5 / AAM 11.5") upgrades protection, cooling, and serviceability for heavy-duty Dodge Ram and GM Duramax applications. BD’s Cast-to-Cool design is engineered to control oil flow and keep lubricant where it matters—helping reduce heat, improve gear life, and support long-term reliability under towing, hauling, and hard-use driving.

BD Diesel 1061825, rear differential cover AA14-11.5, AAM 11.5 differential cover, Dodge Ram rear diff cover, Cummins 2003-2018 differential cover, Duramax 2001-2018 differential cover, cast to cool diff cover, extra capacity sump, magnetic drain plug, O-ring seal differential cover

This cover features an extra-capacity sump that significantly increases fluid volume versus a factory stamped cover, plus internal and external cooling fins to radiate heat. A magnetic drain plug helps capture metallic debris, and dedicated service ports simplify fluid changes. The gasketless, machined design uses a reusable O-ring seal for a clean, leak-free install.

Fitment

• 2001–2019 GM 6.6L Duramax (AAM 11.5" rear differential)
• 2001–2007 GM 8.1L Gas (AAM 11.5" rear differential)
• 2003–2018 Dodge Ram 2500/3500 Cummins (AAM 11.5" rear differential)

Fitment Note: For 2013+ Ram, this cover fits rear leaf spring suspension only. It does not fit rear coil sprung applications due to clearance.

Cross-Reference / Compatible BD DIESEL Products

• BD DIESEL 1061825-RCS DIFFERENTIAL COVER REAR (REAR COIL SPRING) – RAM 2500 2013–2018
• BD DIESEL 1061827 DIFFERENTIAL COVER PACK – FRONT AA 14-9.25 & REAR AA 14-11.5
• BD DIESEL 1061829 DIFFERENTIAL COVER PACK – FRONT AA 12-9.25 & REAR AA 14-11.5
• BD DIESEL 1061826 FRONT DIFFERENTIAL COVER – AA 14-9.25

FAQ

What does “Cast-to-Cool” mean on BD Diesel differential covers?

It’s BD’s cast-aluminum design with built-in cooling fins and oil-control shaping to help manage temperatures and keep lubricant on critical gear surfaces.

Does this cover increase fluid capacity?

Yes. The extra-capacity sump increases fluid volume compared to many factory stamped covers, which can help with heat management and lubrication stability.

Will this fit 2013+ Ram trucks with rear coil springs?

No. For rear coil spring setups, use the BD Diesel coil-spring-specific cover. This cover is intended for rear leaf spring applications on 2013+ Rams.

Specifications for BD DIESEL PRODUCTS 1061825