Description
aFe Street Series Front Differential Cover (Machined) – 2011–2018 GM 2500 3500 AAM 9.25 Axle improve differential protection, fluid serviceability and, where the exact design provides it, fluid capacity or cooling surface area. This listing is built around aFe POWER part numbers 46-71050B, 46-71050A for the 2011–2018 GM 2500 3500 AAM 9.25 Axle.
Differential fluid works under significant shear and temperature. aFe's performance covers are designed as drivetrain-support components, with robust construction and service-oriented features that vary by application.
What This Means on the Car
On vehicles that tow, launch hard, run long sessions or see sustained load, differential temperature and fluid condition become more important. A better cover addresses the environment around the gears rather than changing the gearset itself.
Configuration Guide
Finish: Black Machined, Raw Machined. This selection changes the specified finish/appearance; choose the option that matches the rest of the build.
Fitment & Part Numbers
Application: 2011–2018 GM 2500 3500 AAM 9.25 Axle
aFe POWER part numbers: 46-71050B, 46-71050A
Fitment can differ by engine, drivetrain, trim, factory equipment, emissions configuration and production date. Match the part number above to the vehicle before installation; where aFe publishes SKU-specific installation or emissions requirements, those requirements take precedence.
Legacy Racing Enthusiast Perspective
We like this type of upgrade for hard-used vehicles because it is durability-focused. Exact capacity, cooling fins, magnetic plugs and sight-level features should be verified by part number because they vary by cover. On the 2011–2018 GM 2500 3500 AAM 9.25 Axle, we would make the purchase decision around the limitation this component addresses and how it fits with the car's current and planned modifications.