Differential Cover Dana 30The Red Shield: Heavy Duty Protection for Your Dana 30 Front Axle. The Dana 30 axle is the unsung hero of the Jeep world, serving as the front axle for millions of Wranglers, Cherokees, and Grand Cherokees over the last three decades. While it is a reliable axle, its factory stamped steel cover is a major vulnerability on the trail. A single collision with a rock can peel the lip back, causing fluid loss and expensive gear failure. The ARB 0750002