Differential Ring & Pinion Motive Gear F990389BP, For Ford 9", Gear Ratio: 3.89, Pro Gear, 28-Spline Pinion & 41 Ring Tooth - Fits Ford 9" Race Axles, Replaces: 79-0043-1, F9-389BP-NG, YG F9-PRO-389-O

More about this item : Differential Ring & Pinion Motive Gear F990389BP, For Ford 9", Gear Ratio: 3.89, Pro Gear, 28-Spline Pinion & 41 Ring Tooth - Fits Ford 9" Race Axles, Replaces: 79-0043-1, F9-389BP-NG, YG F9-PRO-389-O

Short Summary: The F990389BP Motive Gear is a Pro Gear ring and pinion set with a 3.89 ratio for Ford 9" differentials, designed for high-horsepower, competition-grade vehicles.

Built from premium materials, this set excels in drag racing, off-roading, and other extreme applications where strength and precision matter most.

Key Features Application: Ford 9" Rear Differentials Gear Ratio: 3.89 Ring Gear Teeth: 41 Pinion Spline Count: 28 Material: 8620 Steel – Pro Gear Rated Rotation: Standard Intended Use: Racing and Off-Road Only Vehicle Compatibility Ford Fits vehicles equipped with Ford 9" race-prepped rear axles Designed for applications requiring higher load capacity Replaces OEM & Aftermarket Part Numbers Richmond Gear: 79-0043-1 Nitro Gear & Axle: F9-389BP-NG Yukon Gear and Axle: YG F9-PRO-389-O Warranty & Quality Assurance Motive Gear backs the F990389BP Pro Gear with a 2-Year or 100,000-Mile warranty.

Engineered for peak strength and reliability under punishing conditions, it's the go-to gearset for professional racers and serious builders who demand the best from their Ford 9" setups.