Rust, rocks, and road debris all take part in destroying differential covers"”so Spicer Drivetrain Products offers a line of axle-specific replacements. These kits include a new cover, plug, and installation bolts for an all-new look. They're available in paintable steel and nodular iron for high strength and good looks. Help keep your vehicle's rear axle cool with a Spicer Drivetrain Products differential cover kit.