SPE Motorsport Ford Super Duty  10.25 And 10.5 Sterling Differential Cover

The SPE Motorsport Differential Cover for Ford Super Dutys is designed to do the job right — simple, durable, and built with real-world performance in mind.

• Simple Maintenance: Features NPT drain and fill plugs for easy service. If you ever need to replace a plug, standard NPT fittings make it simple.

• Proper Drainage: Drain plug is positioned at an optimized angle to drain nearly all fluid cleanly into a pan without running along the axle.

• Easy Filling: Large fill port allows direct bottle insertion for faster, easier fluid fills.

• Sealed Tight: Machined O-ring main seal — no RTV mess or guesswork.

• Stainless Hardware: Corrosion-resistant stainless steel bolts included.

• Designed for Performance: Internally contoured to maintain proper fluid flow across bearings, unlike cheap square covers that cause bearing starvation.

• Built for Clearance: Clears most factory and aftermarket sway bars.

• Finish Options: Available raw or powdercoated in a durable wrinkle black finish.

• Added Capacity: Increased fluid capacity for better cooling and extended differential life.

• Strength Where It Matters: Thick cover design improves axle rigidity under load.

• Built-in Cooling: Integrated heat fins help dissipate heat but are thick enough to handle real abuse — no fragile fins here.

Designed, tested, and built to outperform the rest — whether you're towing heavy, off-roading, or just want peace of mind.

*** FITS 1985-CURRENT 10.25 AND 10.5 STERLING SINGLE REAR WHEEL AXLES(12 BOLT).

**** VERIFY YOUR AXLE TYPE BEFORE ORDERING!

Note: Due to OEM manufacturer relationships with multiple outside suppliers, some differentials may have minor variations in their machining or sealing surfaces compared to the unit used during our design process. While this cover includes an O-ringed gasket, a thin film of sealant may still be required to ensure a proper seal, as these variations are outside of our control.