SKU: 46-70382 | UPC: 802959465332
aFe Power Rear Diff Cover Black w/Machined Fins 17-23 Ford F-350/F-450 6.7L (td) Dana M300-14 (Dually)
aFe Power rear differential cover protects and cools the Dana M300 axle on 2017-2023 Ford F-350 and F-450 Super Duty dually trucks with 6.7L diesel engines. Cast from A356-T6 aluminum this cover holds 5 quarts of gear oil compared to the factory 4 quarts for better lubrication during heavy towing. Internal and external fins transfer heat away while magnetic plugs capture metal particles for longer axle life.
Key Features
- 5 Quart Capacity: Holds 5 quarts at factory fill level versus stock 4 quarts to keep differential fluid circulating in high-heat conditions
- Cooling Fins: Internal and external machined fins expand surface area for efficient heat dissipation from gear oil
- Magnetic Plugs: Deep-reach magnetic drain and fill plugs trap ferrous debris to prevent gear damage
- Oil Sight Glass: Large sight glass with 1/8-inch NPT calibration plug matches factory level to avoid overfilling
- Cast Aluminum Build: A356-T6 aluminum with reinforcing ribs and black powder coat withstands heavy-duty use
Product Notes
- Mounting hardware gasket and seals included for direct bolt-on fit
- Designed for Dana M300-14 bolt pattern axles on dually models
- 17.8 lbs product weight ships in one box measuring 20 x 15 x 5 inches
Installation Notes
- Professional installation recommended.
- Drain old fluid before installing new cover and refill to sight glass level
- All hardware provided bolts to factory locations on Dana M300 axle
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2017-2023 | Ford | F-350 Super Duty | King Ranch Dana M300 Dually |
| 2017-2023 | Ford | F-350 Super Duty | Lariat Dana M300 Dually |
| 2017-2023 | Ford | F-350 Super Duty | Limited Dana M300 Dually |
| 2017-2023 | Ford | F-350 Super Duty | Platinum Dana M300 Dually |
| 2017-2023 | Ford | F-350 Super Duty | XL Dana M300 Dually |
| 2017-2023 | Ford | F-350 Super Duty | XLT Dana M300 Dually |
| 2017-2023 | Ford | F-450 Super Duty | All Dana M300 Dually |
Why Choose aFe Power?
- Engineered for diesel trucks with direct fitment on Ford Super Duty axles
- Cast aluminum construction handles towing and off-road demands
- Integrated cooling and protection extend differential component life
Frequently Asked Questions
-
Q: Does this fit non-dually F-350 models?
A: Designed specifically for Dana M300-14 bolt pattern on dually axles verify your truck specs before purchase -
Q: What material is the cover made from?
A: Durable A356-T6 cast aluminum with black powder coat and machined cooling fins for strength and style -
Q: What warranty covers this part?
A: Backed by aFe Power limited lifetime warranty on the cover against manufacturing defects
Shipping & Handling
- Method: Standard ground shipping via UPS or FedEx
- Availability: In stock - ships same or next business day
- Packaging: Securely packed in one box 20 inches L x 15 inches W x 5 inches H
- Weight: 17.8 lbs

aFe
aFe Power / Advanced FLOW Engineering performance parts deliver proven power gains, improved efficiency, and uncompromising reliability for street, track, and off-road builds. Founded in 1999, aFe Power has become one of the most trusted names in automotive performance, designing and manufacturing high-quality intake systems, exhaust components, filtration solutions, and engine upgrades right here in the USA. Built on an engineering-first philosophy, Advanced FLOW Engineering (aFe) develops products using advanced R&D, in-house testing, and precision manufacturing to ensure consistent results, excellent fitment, and long-term durability across gas and diesel platforms alike. Shop the complete lineup of aFe Power performance parts at Black Ops Auto Works, including cold air intakes, exhaust systems, high-performance air filters, diesel upgrades, and supporting hardware designed to work together for predictable, repeatable gains. aFe Cold Air Intakes & Airflow Upgrades aFe Pow... View Our aFe Products...
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