Early Bronco Ford 9-Inch Differentials & Lockers

Early Bronco Locking Rear Differentials

When it comes to upgrading your Early Bronco’s rear differential, we have plenty of options for tackling your on- and off-road adventures. The Ford 9-inch rear axle has been a staple in the off-roading world, and the right differential setup can make a huge difference in how your Bronco handles tough terrain. Whether cruising with a factory open or limited slip (posi) differential, or stepping up your game with a locking or selectable locker, we’ve got you covered. Check below product listings for a simplified breakdown showing the advantages of each differential option.

43 Items

Ford 9-inch Track Lock Differential, 28 Spline, Loaded w/Spider Gears SKU: 8872

1 Reviews

$379.99

Ford 9-inch Track Lock Differential, 31 Spline, Loaded w/Spider Gears SKU: 8874

1 Reviews

$379.99

Eaton Truetrac Differential for Ford 9in w/ 31 Spline SKU: 8751

1 Reviews

$679.99

Eaton Truetrac Differential for Ford 9in w/ 35 Spline SKU: 8753

1 Reviews

$689.99

Ford 9-inch Yukon Grizzly Locker, 28-spline SKU: YGLF9-28

1 Reviews

$573.02

Ford 9-inch Yukon Grizzly Locker, 35 spline SKU: YGLF9-35

1 Reviews

$583.47

Ford 9-inch Detroit Soft Locker Differential, 31 spline SKU: 8710NET

1 Reviews

$769.99

ARB Ford 9-inch Rear Air Locker Differential, 31 or 35 spline SKU: 8731

3 Reviews

$1,113.95

Ford 9-inch Nodular Iron Dropout, 3.250 Bearing Journal, Extra HD SKU: 8647

1 Reviews

$349.58

LubeLocker Ford 9-inch Competition Differential Cover Gasket SKU: 8976

3 Reviews

$23.95

Steel Core Ford 9-inch Third Member Housing Gasket SKU: 8675

2 Reviews

$19.99

Ford 9-inch Pinion Yoke, 1310 Series, Stock Pinion Support SKU: 8646

2 Reviews

$75.99

Ford 9-inch Pinion Yoke, 1310 Series, Daytona Pinion Support SKU: 8653

1 Reviews

$149.99

Ford 9-inch Pinion Yoke, 1350 Series, Stock or Daytona Pinion Support SKU: 8614

1 Reviews

$135.24

Rear Driveshaft U-bolt Kit, 1350 Pinion Yoke (8614) SKU: 8618

1 Reviews

$13.99

Ford 9-inch Crush Sleeve Eliminator Kit, Solid Spacer With Shims SKU: 8684

1 Reviews

$34.06

Extra HD 3.062 Nodular Iron Dropout for FORD 9 inch SKU: 8617

1 Reviews

$349.58

Early Bronco Ford 9-inch Rear Differential & Locker Options

Upgrading the rear differential on your Early Bronco is one of the best ways to boost performance, both on and off-road. The Ford 9-inch rear axle is legendary in the off-roading world, but choosing the right differential or locker can make all the difference in how your Bronco handles rough terrain. Whether you're sticking to stock options or upgrading to more advanced locking differentials, this guide will help you explore the pros and cons of each option and find the perfect fit for your rig. Let’s break down your choices.

Open Differential (Factory Option)

Transmits power through one axle
Great for street driving, but not ideal for off-roading
Can leave you stuck when traction is limited

Limited Slip Differential (Factory Option)

Uses internal clutch packs to distribute power to both axles
Allows “slip” when turning, so the outside wheel turns faster
Can slip off-road when you need power at both wheels
Quiet and mostly trouble-free
Requires finesse to get the most out of it off-road

Locking Differentials

Detroit Locker / Yukon Grizzly Locker
- Fully automatic locking differentials
- Ideal for hardcore off-roaders
- Low maintenance – install and forget
- Directs power equally to both wheels, providing excellent traction

Selectable Lockers (ARB Air Locker)

Engaged with a switch, giving you control
Open when not engaged, offering smooth, quiet street performance
Switch on for full locking power off-road
Time-tested in extreme off-road environments
Engages quickly with compressed air, locking the differential for instant torque to both wheels
Disengages with a flip of the switch when no longer needed

Each option has its own strengths depending on your driving style and off-roading needs, making it easy to customize your Early Bronco for any adventure.