Revolution Gear & Axle Ring & Pinion Set for Ford 9" (3.70 Ratio, 28-Spline)

This is the Revolution Gear & Axle ring and pinion set for the Ford 9-inch axle in a 3.70 ratio with a 28-spline pinion and standard rotation. The 9-inch is the go-to swap axle for everything from muscle cars to trail trucks, and this is a straightforward gear replacement for it.

The set is machined from 8620 alloy steel and heat treated to meet or exceed original equipment standards. It uses the common 28-spline pinion and a 9.0-inch ring gear with no carrier break for this ratio, so the 3.70 typically works across the standard 9-inch carrier range.

A 3.70 is a moderate ratio that suits owners who have gone up slightly in tire size and want to bring driveability back without dropping highway RPM too far – a sensible choice for street-driven and lightly built trucks and hot rods.

This is a gear set only. It does not include bearings, a crush sleeve, shims, or a pinion seal, and it does not include a carrier or any traction device. Plan on a master install kit and proper professional setup, since ring and pinion patterning is precise work.

Pair it with a Revolution Gear master install kit for the Ford 9-inch 28-spline axle to get the Timken bearings, crush sleeve, shims, and seal needed for a clean, quiet install. Gears carry a 2-year warranty against manufacturing defects.