Speedmaster Ford 9" 28 Spline 3.89:1 Ratio Ring and Pinion Gears Set 8620 PCE211.1004

The Speedmaster Ford 9" 28 Spline 3.89:1 Ratio Ring and Pinion Gears Set (PCE211.1004) is a precision-engineered differential gear package manufactured from 8620 steel for durability and strength. This ring and pinion gear set is designed for Ford 9" rear axles and delivers a 3.89:1 gear ratio, making it ideal for applications requiring improved acceleration and torque multiplication. The 28 spline configuration ensures reliable meshing and power transfer in high-performance and street-driven vehicles.

This gear set is commonly used in hot rods, street machines, drag racing builds, and daily-driven performance vehicles where enhanced low-end power and quicker acceleration are desired. The 8620 alloy steel construction provides the durability needed for sustained spirited driving or competition use. Speedmaster gears are manufactured to tight tolerances and finished to OEM specifications, making them a direct replacement or upgrade option for original Ford 9" differentials. Whether you're restoring a classic Ford or building a modern performance rear end, this ring and pinion set delivers dependable power delivery and reliable gear engagement.

Key Features & Benefits

• Ford 9" Fitment: Designed specifically for Ford 9" rear axles with proven compatibility and direct installation.
• 3.89:1 Gear Ratio: Delivers improved acceleration and low-end torque for performance and street applications.
• 28 Spline Design: Ensures secure engagement and efficient power transmission in high-stress driving conditions.
• 8620 Steel Construction: Premium alloy steel offers superior strength and durability for long-term reliability.
• OEM-Style Specifications: Manufactured to factory tolerances and standard meshing geometry for seamless replacement.

Specifications

Ideal Applications

• Hot rod and street machine builds seeking improved acceleration
• Daily-driven performance vehicles requiring enhanced torque response
• Drag racing and competition setups needing quick low-end power
• Ford 9" differential replacements and upgrades