Designed to shield your differential from direct contact in severe off-road conditions, the Rancho® rockGEAR® front differential cover for the Jeep® Wrangler JL and Ford® Bronco® is manufactured from high-strength nodular iron for added axle and internal gear protection. Ribbed external construction for added strength, it also features an off-set, oversized fill plug for increased fluid capacity and easier/quicker filling.