Ford 9-inch Track Lock with Overhaul Kit & 28-Spline Axles, 66-77 Ford Bronco SKU: 859950

Early Bronco Track Lock with Overhaul Kit & Axles | 28-Spline

Upgrade your Bronco's rear end with this complete Track Lock differential kit built for 28-spline Ford 9-inch axles. Designed specifically for the 1966–77 Ford Bronco, this setup delivers improved traction, strength, and reliability on and off the trail. With a fully assembled clutch-driven Track Lock, heavy-duty axles, a full rebuild kit, and axle seals included, you’re getting everything needed for a true drivetrain overhaul—no press work or hunting for extra parts.

Kit Includes:

• Ford 9-inch Track Lock Differential (28-spline, clutch-driven, fully assembled)

• Pair of Heavy-Duty 28-Spline Axle Shafts with pre-installed bearings, retainers, and studs

• Third Member Overhaul Kit with bearings, races, shims, gasket, gear marking compound, ring gear bolts, and seal

• Rear Axle Housing Seals (Small or Large Bearing—match to axle spec)

• Complete Rear-End Overhaul: Includes differential, axles, rebuild kit, and seals—everything you need for a full 28-spline upgrade

• Clutch-Driven Positraction: Ford 9-inch Track Lock delivers consistent traction by sending power to both wheels under load while maintaining street drivability

• Heavy-Duty 28-Spline Axles: Made from higher-grade materials than stock, fully assembled and ready to bolt in—no press required

• Precision Rebuild Kit: Full third member kit includes differential/pinion bearings, shims, ring gear bolts, seal, gasket, and gear compound

• Fitment Options Included: Choose from small or large bearing axle options to match your Bronco's specific brake and housing setup

Additional Info

• Fitment: 1966–77 Ford Bronco with 28-spline Ford 9-inch rear differential

• Axle Variants Supported:

  • 66–73 Bronco Small Bearing, 10x2.5" drum

  • 66–75 Bronco Large Bearing, 11x1.75" drum

  • 74–75 Bronco Large Bearing, 10x2.5" drum

  • 76–77 Bronco Large Bearing, 11x2.25" drum

• Install Notes: Axles are bolt-in ready with pre-installed bearings and studs. Track Lock differential drops into a standard 9-inch case. Overhaul kit includes all components needed for a complete third member rebuild. Professional installation is recommended.

No more guessing or piecing together parts - this Track Lock & Axle Kit gives you everything needed to build a tough, reliable rear end for your Early Bronco.