Check the listing for details. USA Standard Ring & Pinion gear set for '10 & down Chrysler 9.25", 3.21 ratio. Condition: New. Listed at 308.71 USD. USA Standard Ring & Pinion gear set for '10 & down Chrysler 9.25", 3.21 ratio SKU: ZG C9.25-321 Brand: USA Standard Gear Condition: NEW MPN: ZG C9.25-321 Manufacturer: USA Standard Gear Manufacturer Warranty: 1 USA standard Ring & Pinion gear set for '10 & down Chy 9.25" in a 3.21. USA Standard ring and pinion sets are designed to provide a quality and quiet gear set for OEM replacement. USA Standard's rigorous in-house quality testing and inspections ensure all products pass dimensional, material and fitment testing.. USA Standard Gear replacement ring and pinion gear sets are designed to meet or exceed OEM specification while providing an affordable drivetrain solution. USA Standard Gear employs rigorous in-house quality testing and inspections to ensure its products pass dimensional, material, and fitment testing. Available in a wide variety of OEM and aftermarket ratios, USA Standard Gear ring and pinion sets are ready to withstand the rigors of everyday commuting, trail running, and all types of spirited driving.