Yukon Ring & Pinion Gear Set – Chrysler 9.25" ZF (2011+) – 3.21 Ratio
SKU: YUK883584321729
Upgrade your drivetrain with the Yukon Ring & Pinion Gear Set for 2011-Up Chrysler 9.25" ZF differentials in a 3.21 ratio. Yukon produces ring and pinion sets engineered to meet exacting structural and surface finish standards and the result is smooth engagement, reduced friction, lower operating temperatures, and quiet operation.
The 3.21 ratio is a strong choice for highway-focused applications, factory replacement needs, and builds seeking lower cruising RPM with balanced everyday drivability.
Includes:
- Ring gear
- Matching pinion gear
- Installation kit, bearings, shims, and carrier components sold separately unless noted.
- Sold as a matched gear set
Specifications
- Brand: Yukon Gear & Axle
- Part Number: YG C9.25B-321B
- Product Type: Ring & pinion gear set
- Application: Chrysler 9.25" ZF differential
- Model Years: 2011 and newer
- Gear Ratio: 3.21
- Construction: Heat-treated high-strength gear steel
- Quantity: Sold as a matched set
Fitment
- Fits 2011-up Chrysler 9.25" ZF axle assemblies
- Commonly found in select Chrysler / Ram truck applications depending on year and trim
- Ideal for stock replacement, highway driving, towing balance, and mild performance builds
- Verify axle tag, differential model, and OEM ratio before ordering.
Tech Insight
The 3.21 ratio is often selected for highway efficiency and lower engine RPM at cruising speeds. It can also be an excellent factory replacement ratio when restoring drivability after differential damage.
Modern axle platforms such as the Chrysler 9.25 ZF require precise setup procedures. Proper backlash, pinion preload, and tooth pattern are essential for quiet operation and long gear life.