Differential Lockers

Differential Lockers: lock both wheels together when traction runs out

A standard open differential sends torque to the wheel with the least grip, so the moment one tire lifts or spins on ice, mud or a rock ledge, you go nowhere. Differential lockers fix that by tying both axle shafts together so both wheels turn at the same speed, putting power down through the tire that still has grip. Selectable units let you switch that lock on and off from the cab; automatic lockers engage under load on their own; limited-slip units bias torque without a hard lock, which suits street and track cars better than a full locker.

Which behavior you want depends on how the vehicle is used, and that is the choice this category is built around.

What we stock

There are 112 differential lockers in stock here, currently priced from $199 to $2,605 - that range moves with inventory and is not a fixed quote. Eight brands are carried. Eaton is the deepest with 45 products, followed by ARB at 28 and Yukon Gear & Axle at 24, then OS Giken, Cusco, Ford Racing, Tazer and BD Diesel filling out the rest.

The range spans hard-core 4x4 hardware and sports-car limited-slips. On the truck and trail side, the ARB Traction Pack for the Jeep JK and the Yukon Grizzly Locker for GM & Chrysler 11.5in / 30 spline cover heavy axles. Toyota owners have the Eaton ELocker for the 4Runner, Tacoma, Sequoia, Tundra, T-100 and LC90 and the 36-spline ELocker for the Tundra 10.5in. For road and track, the OS Giken Super Lock LSD for the Supra JZA80 and a Yukon Dura Grip for GM & Chrysler 11.5in show the limited-slip side.

Fitment data is recorded on 30 of these products, spanning model years from 1957 to 2023. Named vehicles include the Subaru Impreza, Dodge Ram 1500, Toyota Land Cruiser, Mazda RX-7, Ford F-150, Mazda Miata, Toyota Supra, GM 14 Bolt, Ford 9In, Jeep Wrangler and Suzuki 10 Bolt.

How to choose

  • Selectable (air or electric): full lock on demand, open the rest of the time. Best for a rig that does both daily driving and serious off-road, like the ARB and Eaton ELocker units. Highest cost and needs air or wiring.
  • Automatic locker: mechanical, engages under load with no switch. Simple and strong for a dedicated trail axle.
  • Limited-slip / LSD: the OS Giken, Cusco and Yukon Dura Grip route power without a hard lock, keeping street and track manners predictable.

Match the unit to your axle - carrier series, ring gear size and spline count all have to line up, which is why product names call out things like 30-spline or 36-spline.

What else you need

Installing a locker means opening the diff, so plan for setup and rebuild parts. Browse Differential Components for bearings, shims and ring-and-pinion, seal it back up with a Differential Cover, and check your Axles match the new carrier's spline count. The full Drivetrain section also carries Clutch Rebuild Kits and Flywheels if the driveline is already apart.

Fitment and ordering

Not sure which carrier your axle uses? Call fitment help at 813-535-5801 or reach us through Contact Us. All orders ship free, and Affirm and Katapult financing is available.

Differential Lockers: lock both wheels together when traction runs out

A standard open differential sends torque to the wheel with the least grip, so the moment one tire lifts or spins on ice, mud or a rock ledge, you go nowhere. Differential lockers fix that by tying both axle shafts together so both wheels turn at the same speed, putting power down through the tire that still has grip. Selectable units let you switch that lock on and off from the cab; automatic lockers engage under load on their own; limited-slip units bias torque without a hard lock, which suits street and track cars better than a full locker.

Which behavior you want depends on how the vehicle is used, and that is the choice this category is built around.

What we stock

There are 112 differential lockers in stock here, currently priced from $199 to $2,605 - that range moves with inventory and is not a fixed quote. Eight brands are carried. Eaton is the deepest with 45 products, followed by ARB at 28 and Yukon Gear & Axle at 24, then OS Giken, Cusco, Ford Racing, Tazer and BD Diesel filling out the rest.

The range spans hard-core 4x4 hardware and sports-car limited-slips. On the truck and trail side, the ARB Traction Pack for the Jeep JK and the Yukon Grizzly Locker for GM & Chrysler 11.5in / 30 spline cover heavy axles. Toyota owners have the Eaton ELocker for the 4Runner, Tacoma, Sequoia, Tundra, T-100 and LC90 and the 36-spline ELocker for the Tundra 10.5in. For road and track, the OS Giken Super Lock LSD for the Supra JZA80 and a Yukon Dura Grip for GM & Chrysler 11.5in show the limited-slip side.

Fitment data is recorded on 30 of these products, spanning model years from 1957 to 2023. Named vehicles include the Subaru Impreza, Dodge Ram 1500, Toyota Land Cruiser, Mazda RX-7, Ford F-150, Mazda Miata, Toyota Supra, GM 14 Bolt, Ford 9In, Jeep Wrangler and Suzuki 10 Bolt.

How to choose

  • Selectable (air or electric): full lock on demand, open the rest of the time. Best for a rig that does both daily driving and serious off-road, like the ARB and Eaton ELocker units. Highest cost and needs air or wiring.
  • Automatic locker: mechanical, engages under load with no switch. Simple and strong for a dedicated trail axle.
  • Limited-slip / LSD: the OS Giken, Cusco and Yukon Dura Grip route power without a hard lock, keeping street and track manners predictable.

Match the unit to your axle - carrier series, ring gear size and spline count all have to line up, which is why product names call out things like 30-spline or 36-spline.

What else you need

Installing a locker means opening the diff, so plan for setup and rebuild parts. Browse Differential Components for bearings, shims and ring-and-pinion, seal it back up with a Differential Cover, and check your Axles match the new carrier's spline count. The full Drivetrain section also carries Clutch Rebuild Kits and Flywheels if the driveline is already apart.

Fitment and ordering

Not sure which carrier your axle uses? Call fitment help at 813-535-5801 or reach us through Contact Us. All orders ship free, and Affirm and Katapult financing is available.