[Machined Fins w  &  Gear Oil]

aFe Powers new rear differential cover brings performance engineering to the protection of your axles differential. This differential cover is constructed out of durable die-cast A380 aluminum with reinforced ribs and wrinkle black powder-coating with machined fins for maximum strength and styling. This cover comes with all necessary hardware and includes an O-ring for a leak-free seal. The Pro Series differential covers include a oil level sight glass and deep reach magnetic dip stick for maximum protection. This cover fits the Dana #50/60/61 Axles. Built-in External fins: Built-in external fins transfer heat from the fluid to the outside air for maximum cooling. Magnetic Drain/Fill Plug: This system incorporates a magnetic drain plug to capture loose particles for maximum rear-end protection. Oil Level Sight Glass: Pre-installed large oil level sight glass with calibration plug set to the factory fluid level to eliminate overfilling. Group IV synthetic base: This competition proven formulation utilizes a group IV synthetic base along with a proprietary additive package that reduces drag, resist foaming and maintains its viscosity under extreme heat and high loads. Usage: The PRO Guard D2 Synthetic 75W-90 limited slip gear oil exceeds the performance requirements of API GL-5 recommended for both open and limited slip applications. Note 1: Not for use in transmissions. Do not mix with other fluids. Note 2: This cover fits the Dana #50/60/61 Axles, see comparison photo below for verification. Fits: 1998-2015 Ford F-250, 1994.5-2015 Ford F-350, 2000-2005 Ford Excursion. When it comes to engineering for power, performance, protection and value, aFe Power is the only choice.