Yukon Chrysler 9.25" ZF Ring & Pinion Gear Set - 2011+, 3.21 Ratio
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 for 2011-Up Chrysler 9.25" ZF differentials
- 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
- Spline Count: 29
- Construction: Heat-treated high-strength gear steel
- Quantity: Sold as a matched set
Fitment
- Fits 2011-up Chrysler 9.25" ZF axle assemblies
- Verify axle tag, differential model, and OEM ratio before ordering.
| Make | Model | Year Range |
|---|---|---|
| Ram | 1500 | 2011–2019 |
Tech Insight
What vehicles use the 2011+ Chrysler 9.25 ZF axle?
The Chrysler 9.25 ZF rear axle is commonly found in 2011-up Ram 1500 trucks. Always verify axle identification and gear ratio before ordering, as multiple axle options were available depending on model and package.
Is a 3.21 gear ratio good for highway driving?
Yes. The 3.21 ratio is one of the most fuel-efficient factory gear options available in many Ram 1500 applications. It provides lower engine RPM at highway speeds and is commonly found in daily-driven trucks focused on fuel economy and cruising comfort.
Can I use these gears to change from a different gear ratio?
Yes, but changing gear ratios may require additional carrier, setup, or calibration considerations depending on your axle configuration. Verify carrier compatibility and consult your vehicle specifications before ordering.
Do I need a master install kit when replacing ring and pinion gears?
Yes. New bearings, races, seals, shims, and installation hardware should be installed whenever replacing ring and pinion gears. A complete overhaul kit helps ensure proper setup and long-term reliability.