aFe Power Rear Diff Cover Black w/Machined Fins 17 Ford F-350/F-450 6.7L (td) Dana M300-14 (Dually)

This aFe drivetrain or fluid-service component is the Rear Diff Cover Black w/Machined Fins 17 Ford F-350/F-450 6.7L (td) Dana M300-14 (Dually) for 2017-2021 Ford F-350. Confirm the axle, transmission or engine application, capacity, material, sealing surface, fastener requirements, clearance, and specified fluid before ordering.

Key Features

• Material: aluminum alloy, CNC-machined for precise fitment.
• Finish: black anodized coating for corrosion resistance.
• Exterior machined cooling fins increase surface area for heat rejection.
• Increased fluid capacity over factory engine oil pan.
• Direct bolt-on using OEM gasket surface and factory mounting hardware.
• Resists corrosion, thermal fatigue, and impact damage.

Fitment

Specifications

What’s Included

One new aFe diff cover in the exact configuration and quantity identified by this listing. Hardware, clamps, couplers, gaskets, sensors, wiring, fluids, calibration, and accessories are included only when expressly stated.

About aFe Power

aFe Power develops application-specific intake, filtration, exhaust, cooling, tuning, suspension, drivetrain, and truck-performance components supported by product testing and documented installation requirements.

Important Disclosures

• California Proposition 65 warning: this product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.

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• Shop the complete aFe Power collection

Frequently Asked Questions

How do I confirm the Rear Diff Cover Black w/Machined Fins 17 Ford F-350/F-450 6.7L (td) Dana M300-14 (Dually) matches my axle, transmission, or engine (aFe 46-70382)?
Use the exact housing or transmission model, bolt pattern, capacity, drain and fill locations, clearances, and manufacturer application notes.

Are a gasket and hardware included?
Only components expressly listed for this exact product are included. Confirm gasket or sealant, bolts, plugs, magnets, and required fluids before service.

Which fluid should be used?
Use the vehicle and component manufacturer’s current specification. Capacity can change with an aftermarket cover or pan, so verify level by the prescribed procedure.

What should be inspected for leaks?
Inspect the sealing surface, plugs, fittings, fasteners, and surrounding components after filling and again after the initial heat cycle.

Installation Instructions

1. Confirm aFe part number 46-70382, the complete vehicle or specification-based application, and all required supporting components.
2. Clean the assembly and surrounding area, drain fluid safely, and compare bolt patterns, plugs, seals, clearances, and capacity before removing factory parts.
3. Prepare sealing surfaces, install the specified gasket or sealant and hardware sequence, and refill with the correct fluid using the prescribed level procedure.
4. Inspect for leaks and interference after the initial heat cycle and recheck level and fasteners as directed.