Heavy Duty Differential Skid Plate- Dana 44 Heavy Duty Differential Skid Plate- Dana 44 Protect your factory differential cover with these heavy duty skid plates. Designed to fit the contours of your stock differential cover and made of durable 3/16"" black powdercoated steel, these skid plates will help you slide over obstacles and no get hung up. Incudes replacement mounting hardware and instructions.