A Wrangler JL’s differential cover performs the valuable function of keeping delicate working gears safely shielded, while holding in differential oil and keeping out all kinds of mud, debris, and contaminants that could gum up the workings. Reinforced aftermarket 2018-2023 Wrangler differential covers are made extra-tough to armor the differential in case it scrapes over rocks or other obstacles – steel or nodular iron construction are common among these parts. These 2018-2023 Wrangler axles & hubs components also include finned aluminum variants in case you often drive your Jeep Wrangler in such a way as to build up lots of heat in the differential – these finned covers provide rapid, effective cooling while maintaining full protection of the differential’s innards. Many different companies – Poison Spyder, Omix-ADA, Alloy USA, Rugged Ridge, ARB, and more – make 2018-2023 differential covers, giving you an array of construction details and functions to choose from.