Solid Dana 60/70 Differential Cover Product Details: Features Lifetime warranty Thick nodular iron casting with reinforcing ribs. Fully machined seal surface. Machined bolt bosses for maximum clamping force. Benefits Adds rigidity to weak factory housings Replaces weak factory stamped steel covers Large diameter fill plug for easy fluid replacement Dense material quiets down noisy lockers. Includes Heavy duty powder coated cover. Zinc plated hardware Fill plug Silicone sealant. Works on Dana 60 and Dana 70.