Yukon Gear & Axle YDAF9-350YGL-31 Dropout Assembly Ford 9in Differential Grizzly Locker 3.50 Ratio 31 Spline

The Yukon Gear & Axle YDAF9-350YGL-31 is a complete, fully assembled dropout assembly engineered for the iconic Ford 9-inch differential. Built by Yukon's expert technicians, this unit arrives fully shimmed, backlashed to factory specification, and ready for a straight drop-in installation — eliminating the time-consuming setup work typically associated with differential rebuilds.

This dropout is upgraded with a Yukon Grizzly Locker, a heavy-duty automatic locking differential designed to deliver maximum traction and reliability under demanding conditions. The Grizzly Locker engages both rear wheels simultaneously when traction is needed, then releases for smooth cornering — making it an ideal choice for off-road, towing, and high-performance street applications.

Key Specifications:

• Application: Ford 9-inch differential
• Spline Count: 31 spline
• Ring & Pinion Ratio: 3.50:1
• Locker: Yukon Grizzly Locker (integrated)
• Assembly Status: Fully assembled, shimmed, and backlash-set to spec

Key Features:

• Drop-in ready — no additional setup or shimming required
• Assembled by certified Yukon technicians for consistent, reliable builds
• Grizzly Locker provides positive locking traction in both wheels
• Ideal for performance builds, off-road use, and heavy-duty towing applications
• Compatible with the widely used and highly regarded Ford 9-inch axle housing

Whether you're building a high-performance street machine, a capable off-road rig, or a heavy-duty work truck, the Yukon YDAF9-350YGL-31 delivers professional-grade differential performance with the convenience of a fully preassembled unit.