If you think that’s not a stock Explorer rear axle, you’re correct. It’s taken from a 2003 Harley Davidson-edition F-150. It’s a robust item that boasts a 9.75-inch ring gear, a factory-installed limited-slip differential, and is wider than both a Ranger and an Explorer rear axle. As an added bonus, the tone ring signal is compatible with the Explorer’s ECM computer. Look closely and you’ll see where Smitty notched the frame above the rear axle to gain bump travel.