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AFE Power 46-71140R aFe Pro Series Differential Covers

AFE Power 46-71140R aFe Pro Series Differential Covers

$319.00
$319.00
Sale Sold out

The aFe Pro Series Differential Cover 46-71140R is engineered for Chrysler 9.25-inch axles found in 1994–2009 Ram 1500/2500 and Dodge Durango platforms. This axle is legendary for its strength but notorious for heat buildup under load—especially when paired with the 5.7L HEMI or 5.9L Magnum V8. The Pro Series solves that problem decisively.

Precision-cast from A356-T6 aluminum, the 46-71140R boosts fluid capacity by 1.5 quarts and employs a sophisticated fin array that lowers oil temperature up to 35°F. Dual neodymium magnets in the drain and fill plugs trap fine ferrous particles from gears and bearings before they recirculate. A machined sight glass replaces the need to pull the fill plug for level checks, and a calibration plug ensures you fill to the exact factory specification.

The thermal management alone pays dividends: every 15°F reduction in operating temperature doubles gear oil life. For HEMI-swapped Rams or heavy-tow builds, the Pro Series also eliminates cover flex at the pinion bore under high torque loads, preserving gear pattern and bearing preload. Textured powdercoat with machined fins gives your rig a distinctly aggressive look.

Your Chrysler 9.25-inch is a beast. Give it the cooling and protection it needs with the aFe Pro Series—order now and keep your diff alive through the toughest pulls.
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Frequently Asked Questions

What axle types are compatible with the aFe Pro Series differential cover?

The aFe Pro Series differential cover is available for many popular axles including Dana 44, Dana 60, GM 14-bolt, Ford 8.8-inch, Ford 9-inch, and Dodge corporate axles. It is constructed from cast aluminum with heavy reinforced ribs to prevent flex under high torque loads. The cover increases oil capacity by about 1 to 2 quarts over stock and uses machined fins to dissipate heat more efficiently than any factory cover.

Does the aFe Pro Series differential cover come with a magnetic drain plug?

Yes, every aFe Pro Series differential cover includes a magnetic drain plug that captures ferrous wear particles from the ring and pinion gears and differential bearings. This magnetic plug helps you monitor the internal condition of your differential during routine fluid changes. The cover also includes a threaded fill plug for easy refills, and some versions come pre-filled with aFe PRO Guard D2 synthetic 75W-90 gear oil.

Will this aFe Pro Series cover fit both front and rear differentials on my 4x4 truck?

The aFe Pro Series differential cover is sold individually for either front or rear applications, and aFe also offers complete sets with both covers plus a bottle of PRO Guard D2 synthetic oil. The bolt patterns and gasket surfaces are specific to each axle model, so you need to order the correct part number for your front and rear axles separately. Always verify your axle's make, model, and bolt count before purchasing to ensure proper fitment.

How much does the aFe Pro Series differential cover reduce fluid temperature compared to stock?

The aFe Pro Series differential cover can reduce gear oil operating temperatures by 15 to 25 degrees Fahrenheit compared to a factory stamped steel cover, thanks to its cast aluminum construction with extensive finning that increases surface area. The extra oil capacity also provides more thermal mass, which helps delay heat buildup during long highway pulls or heavy towing. Lower fluid temperatures extend the life of the gear oil and reduce wear on the ring, pinion, and bearings.

Will the aFe Pro Series differential cover work with my factory gasket?

The aFe Pro Series differential cover uses the same bolt pattern and gasket surface as the factory cover, but it typically requires an aFe-specific gasket or RTV sealant rather than reusing the stock gasket because the casting surface is machined to a different profile. aFe includes the necessary hardware and gasket with most covers, and many versions accept a reusable silicone gasket instead of a paper or cork gasket. This ensures a leak-free seal even under extreme temperature swings.

What is the weight difference between the aFe Pro Series cast aluminum cover and a stock steel cover?

The aFe Pro Series differential cover weighs approximately 5 to 8 pounds depending on the axle application, which is slightly heavier than a thin stamped steel factory cover but significantly lighter than heavy cast iron alternatives. The added weight comes from the thicker aluminum casting and reinforced ribs that provide the structural strength needed to resist flex under hard launches. Despite the small weight increase, the improved cooling and rigidity make it a worthwhile upgrade for any performance or towing build.