Yukon Gear & Axle YGK139 Complete Re-Gear & Install Kit Dana 80 Rear / Dana 60 Reverse Thick Front 5.38 Ratio

The Yukon Gear & Axle YGK139 is a complete re-gear and installation kit engineered for Ford F350 trucks equipped with a Dana 80 rear differential and a Dana 60 reverse-rotation thick front differential. Bundled at a 5.38 gear ratio, this all-in-one package delivers everything needed to complete a full front and rear differential re-gear in a single part number.

What's Included:

• High-performance front ring and pinion gear set — Dana 60 reverse-rotation, thick (4.11-and-down carrier), 9.75" ring gear diameter, 29-spline pinion, 12 ring gear bolts
• High-performance rear ring and pinion gear set — Dana 80
• Yukon Master Overhaul Kit for the front differential
• Yukon Master Overhaul Kit for the rear differential
• All bearings, seals, shims, and small parts required for a complete differential rebuild

Key Features:

• 5.38 Gear Ratio — delivers maximum torque multiplication, ideal for large tire upgrades, heavy towing, and off-road performance
• Advanced Engineering — Yukon engineers utilize state-of-the-art design, advanced heat-treating techniques, and rigorous quality testing to ensure precise surface finish and structural integrity
• Quiet & Cool Running — ring and pinion sets are engineered to run cooler and quieter than competing aftermarket gear sets
• Thick Gear Design — front gear set is specifically designed for the 4.11-and-down carrier, ensuring proper fit in the Dana 60 reverse-rotation front axle
• Y.E.S. Plan Covered — Yukon's lifetime, comprehensive, no-questions-asked protection plan covers the gear set kit for as long as you own your vehicle

Whether you're correcting gear ratios after a tire size increase, chasing more towing power, or rebuilding worn differentials, the YGK139 kit simplifies the process by pairing the correct high-quality ring and pinion sets with the most complete overhaul kits available — all under one part number.