Yukon Gear & Axle YDAF9-389SVO-31 Ford Dropout Assembly with Trac-Lok LSD Ratio Spline Differential - 9 3.89 31

The Yukon Gear & Axle YDAF9-389SVO-31 is a complete dropout assembly designed for Ford 9" differentials, professionally built and ready to install. Each assembly is expertly shimmed and backlashed to manufacturer specifications by Yukon's experienced technicians, eliminating the time-consuming setup process typically required for differential installation.

This unit features an upgraded Trac-Lok clutch-type limited slip differential, providing superior traction and performance compared to open differentials. The limited slip design automatically transfers power to the wheel with better traction, making it ideal for high-performance street applications, drag racing, and off-road use where maintaining forward momentum is critical.

Key Specifications:

• 3.89:1 gear ratio for balanced acceleration and highway cruising
• 31 spline axle shaft configuration
• Trac-Lok clutch-type limited slip differential for enhanced traction
• Fits Ford 9" differential housings
• Fully assembled and pre-shimmed for proper gear contact pattern
• Pre-set backlash to factory specifications

What's Included:

• Complete dropout assembly with ring and pinion gears
• Trac-Lok limited slip differential carrier
• All internal bearings and hardware installed

Please Note: Pinion yoke is not included and must be ordered separately. This assembly is designed as a bolt-in replacement for Ford 9" third members, significantly reducing installation time while ensuring proper gear setup.