Description
If you’re running a late-model Chrysler 8.75″ rear axle and want quicker acceleration with better highway cruising characteristics, a 3.91 ring and pinion swap is one of the most cost-effective upgrades available. This kit delivers a direct bolt-in solution without fabrication, allowing you to dial in the exact final drive ratio your application demands. Whether you’re building a street machine or fine-tuning a track setup, proper gearing is non-negotiable for extracting maximum performance.
- 3.91 final drive ratio
- 29-spline pinion
- 489 differential case
- Mopar 8.75″ axle
- Complete ring & pinion kit
- Bolt-on installation
- Late-model Chrysler fitment
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