Richmond Gear 79-0054-1 6.50 ratio ring gear ⚙
Product description
Key features
This ring and pinion gear set brings stronger torque control and longer service life for high demand Ford 9 inch differentials. It targets restorers and performance-minded owners who need a durable, direct-fit solution for classic Broncos, Mustangs and F-series trucks. The main benefit is improved load capacity under stress, according to the manufacturer, while retaining factory-style fitment and clearances.
Tech specs
- Reference: Richmond Gear 79-0054-1
- Type: Ring and pinion gear set
- Compatibility: Ford Bronco 1966-1986, Mustang 1965-1973, F-150 1975-1986
- Material: 9310 steel
- Spline: 28
- Ratio: 6.50
- Warranty: 2 year or 100,000 mile
Who it’s for
It’s a great fit if you restore vintage Fords and want a stronger differential component that keeps stock geometry and works with common axle setups. You’ll appreciate the 28 spline pinion and 9310 steel build when you need consistent durability under repeated heavy loads. It might not be a great match if you need a custom gear ratio not listed here or if your axle uses a different spline count, since compatibility is specific to certain Ford 9 inch applications.
What stands out
The combination of a 39-tooth ring gear with a 6-tooth pinion gives a balanced engagement pattern that helps distribute forces across the tooth face. The 1.313 inch pinion shaft diameter and 28 spline count add stability under high torque, and the 9310 steel construction is noted for wear resistance. A two year or 100,000 mile warranty offers extra reassurance, and installation follows standard ring and pinion procedures used on this axle family.
Usage tips
Allow a professional or experienced mechanic to set backlash and carrier bearing preload for best results. Check that pinion depth and bearing condition match requirements before installation to avoid premature wear. During break-in, moderate loads help seating of the new gear surfaces. 😊