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

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

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

Purchase Ford 9-inch Track Lock with Overhaul Kit & 28-Spline Axles, 66-77 Ford Bronco
$827.92 SKU: 859950
Fits 66-77 Bronco
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Product Overview:

Upgrade your Early Bronco rear end with a no-nonsense package built for serious traction and long-term durability. This complete Track Lock Kit with 28-spline Axles includes everything you need to overhaul your Ford 9-inch—clutch-driven posi differential, heavy-duty axles, a full third member rebuild kit, and rear axle seals. Whether you're hitting the rocks, climbing grades, or just tired of spinning one wheel, this setup delivers the grip and dependability your Bronco was built for.

Full description

Upgrade your Early Bronco rear end with a no-nonsense package built for serious traction and long-term durability. This complete Track Lock Kit with 28-spline Axles includes everything you need to overhaul your Ford 9-inch—clutch-driven posi differential, heavy-duty axles, a full third member rebuild kit, and rear axle seals. Whether you're hitting the rocks, climbing grades, or just tired of spinning one wheel, this setup delivers the grip and dependability your Bronco was built for.


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.

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

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