OMIX proudly offers high - quality replacement parts so that you can keep you part of the Jeep heritage on the road - parts that always meet or exceed manufacturers specs for quality you can trust. This replacement differential pinion shim kit fits 07 - 18 Wrangler JK JKU equipped with Dana 30 Dana 44 standard differentials. Kit contains shims of varying thicknesses that are vital in the proper adjustment of preload and backlash of the front differential carrier. Replaces OE 5066539AA