
- This cover increases gear oil capacity to approximately 5 quarts at the factory fill level, compared to the factory cover's 4-quart capacity.
- Built-in internal and external cooling fins maximize differential oil cooling by increasing surface area.
- A magnetic drain plug and deep-reach magnetic fill plug capture loose particles, ensuring maximum rear-end protection.
- An 1/8" NPT calibration plug, pre-set to the factory fluid level, eliminates the risk of overfilling.

The aFe 46-70380 POWER rear differential cover offers superior performance and protection for your axle's differential. Crafted from robust A356-T6 cast aluminum, this cover features reinforcing ribs for exceptional strength and durability. Its raw finish, accented with machined fins, provides a distinctive and rugged aesthetic. Installation is streamlined with included mounting hardware, and a factory-set calibration plug prevents accidental overfilling. For enhanced protection, the cover is equipped with a magnetic drain plug and a deep reach magnetic fill plug, effectively capturing loose particles.
This cover increases gear oil capacity to approximately 5 quarts at the factory fill level, compared to the factory cover's 4-quart capacity.
Built-in internal and external cooling fins maximize differential oil cooling by increasing surface area.
A magnetic drain plug and deep-reach magnetic fill plug capture loose particles, ensuring maximum rear-end protection.
An 1/8" NPT calibration plug, pre-set to the factory fluid level, eliminates the risk of overfilling.
This aFe POWER rear differential cover is specifically designed to fit 2017-2023 Ford Super Du[...]
- This cover increases gear oil capacity to approximately 5 quarts at the factory fill level, compared to the factory cover's 4-quart capacity.
- Built-in internal and external cooling fins maximize differential oil cooling by increasing surface area.
- A magnetic drain plug and deep-reach magnetic fill plug capture loose particles, ensuring maximum rear-end protection.
- An 1/8" NPT calibration plug, pre-set to the factory fluid level, eliminates the risk of overfilling.