aFe 46-70032 Pro Series Dana 80 Rear Differential Cover Black Ford/Dodge Trucks

Vehicle Fitment

• 1999-2007 Ford F-350 Super Duty (Dually, Dana 80 Rear Axle, RWD/4WD)
• 1999-2007 Ford F-450 Super Duty (Dually, Dana 80 Rear Axle, RWD/4WD)
• 2008-2010 Ford F-350 Super Duty (Dually, Dana 80 Rear Axle, RWD/4WD)
• 2011-2015 Ford F-350 Super Duty (Dually, Dana 80 Rear Axle, RWD/4WD)
• 2011-2015 Ford F-450 Super Duty (Dually, Dana 80 Rear Axle, RWD/4WD)
• 1994-2002 Dodge Ram 2500 (5-Speed Manual Transmission Only, Dana 80 Rear Axle, RWD/4WD)
• 1994-2002 Dodge Ram 3500 (All Transmissions, Dana 80 Rear Axle, RWD/4WD)

Fitment Notes

• This cover fits vehicles equipped with a Dana 80 rear axle only. Always verify rear axle type before ordering.
• For Ford Super Duty applications, this cover is designed for Dually (DRW) trucks only. Single rear wheel (SRW) Ford F-350 and F-450 trucks use a different axle (Sterling 10.25/10.5) and require a different part number.
• Does NOT fit 2008-2010 Ford F-450 Super Duty - these trucks use a drop-out rear end that is not compatible with this cover.
• For 1994-2002 Dodge Ram 2500: fits 5-speed manual transmission trucks only. Ram 2500 with automatic transmissions used a Dana 70 axle and require a different cover.
• 1994-2002 Dodge Ram 3500 fitment applies to all transmission configurations.
• If the vehicle has been modified or lifted and the axle rotation angle has changed, verify the fluid level using the sight glass calibration plug rather than relying solely on the factory fill reference.

Features

• Increased oil capacity of 5 quarts at the factory fill line (factory cover holds approximately 4 quarts), providing enhanced lubrication and a greater thermal buffer during towing, hauling, and heavy-duty use.
• Built-in internal and external machined fins transfer heat from the differential fluid to the outside air, significantly improving thermal management compared to the smooth factory cover.
• Magnetic drain plug captures ferrous wear particles suspended in the gear oil, protecting ring and pinion gears and bearings from accelerated abrasive wear.
• Deep-reach magnetic fill plug extends further into the differential housing to capture fine metallic particles that a standard plug misses.
• Pre-installed oil level sight glass with a calibration plug set to the factory fluid level, eliminating guesswork and preventing accidental overfilling during fluid changes.
• Constructed from durable die-cast A380 aluminum with reinforced ribbing for maximum structural strength - far more rigid than the factory stamped steel cover.
• Wrinkle black powder coat finish with machined fins delivers a premium, aggressive appearance while providing corrosion resistance and long-term durability.
• Includes RTV silicone gasket for a reliable, leak-free seal at the differential housing mating surface.
• All mounting hardware is included for a complete, hassle-free installation using factory bolt holes.

Specifications

• Part Number: 46-70032
• Product Line: Pro Series
• Axle Compatibility: Dana 80 Rear Axle
• Material: Die-Cast A380 Aluminum
• Finish: Wrinkle Black Powder Coat with Machined Fins
• Oil Capacity: 5 Quarts (at factory fill line; stock cover holds ~4 quarts)
• Seal Type: RTV Silicone Gasket
• Drain Plug: 3/4" NPT Magnetic Drain Plug (included)
• Fill Plug: Deep-Reach Magnetic Fill Plug (included)
• Calibration Plug: 1/8" NPT, set to factory fluid level (included)
• Sight Glass: Oil Level Sight Glass (pre-installed)
• Position: Rear Differential
• Hardware: All mounting hardware included

Included Components

• 1x aFe Pro Series Dana 80 Differential Cover (Black w/ Machined Fins)
• 1x RTV Silicone Gasket
• 1x 3/4" NPT Magnetic Drain Plug
• 1x Deep-Reach Magnetic Fill Plug
• 1x 1/8" NPT Calibration Plug
• 1x Oil Level Sight Glass (pre-installed)
• 1x Complete Mounting Hardware Kit

Product Description

The aFe POWER 46-70032 Pro Series Rear Differential Cover is a precision-engineered upgrade designed specifically for vehicles equipped with the Dana 80 rear axle - including 1999-2015 Ford F-350/F-450 Super Duty Dually trucks and 1994-2002 Dodge Ram 2500/3500 heavy-duty pickups. The factory stamped steel differential cover provides minimal thermal management and zero fluid contamination protection, making it one of the most overlooked weak points in the drivetrain of hard-working trucks. The aFe Pro Series cover addresses every one of these shortcomings in a single bolt-on upgrade, delivering measurable improvements in fluid temperature control, contamination management, and long-term gear protection without requiring any drivetrain disassembly beyond a standard fluid service.

The cover's die-cast A380 aluminum construction with integrated internal and external machined fins is the centerpiece of its thermal advantage. Heat generated by the ring and pinion gears during heavy towing or extended highway driving is drawn into the aluminum body and dissipated through the external fin surface into the passing airstream - the same principle used in performance engine oil coolers. At the same time, the increased oil capacity of 5 quarts (versus the factory approximately 4 quarts) provides a larger thermal mass and a greater supply of lubricant at all times, reducing the rate of fluid breakdown under sustained high-load conditions. The magnetic drain and deep-reach fill plugs work in tandem to continuously capture ferrous wear particles suspended in the gear oil, keeping abrasive material away from load-bearing surfaces throughout the drain interval.

Installation is straightforward for any technician comfortable with a standard differential fluid service. All mounting hardware is included, and the pre-installed oil level sight glass with its factory-height calibration plug removes all guesswork from the refill process - simply fill until the sight glass indicates the correct level. The wrinkle black powder coat finish with machined fins provides an aggressive, premium appearance that holds up to road grime, mud, and underbody corrosion over the long term. For Ford Dually Super Duty owners and Dodge Ram 2500/3500 owners who use their trucks for towing, fleet work, or any demanding application, this cover is a critical drivetrain protection upgrade that pays for itself in extended differential service life.