Spartan Locker^®

The Spartan Locker^®, by USA Standard Gear, is built to provide affordable, reliable traction for your off-road rig and everyday commuter. Considered to be the toughest Lunchbox Locker on the market, the Spartan Locker is easily installed without any special tools or equipment.

The Spartan Locker's patent pending design replaces the spider gears in a standard carrier case, does not use the thrust washers, and has a revolutionary spring and pin design that makes installation even easier! These USA Standard Gear Spartan lockers are mechanical lockers that fit into a standard differential carrier, replacing the open spider gears. They do not use thrust washers and have a revolutionary spring and pin design to make installation a snap! Spartan lockers feature high-nickel 9310 chromoly drivers and couplers for added strength.

The advantages of utilizing a Spartan Locker are its 100% lockup and affordability, both in initial cost and installation cost. The install is easier on the wallet because the differential does not need to be removed for installation and some enthusiasts install the unit themselves versus taking it to a shop.

Give your vehicle great traction and save some cash. Drop in Spartan Lockers for improved traction. They're available for a variety of makes and models spanning more than a half-century.

• Big on traction, low on cost
• Patent pending design replaces spider gears
• Low-cost shop installation, can be DIY installed
• Reliable 100% lock up power transfer
• Features heat-treated 9310 steel internals for enhanced durability
• One-year warranty against manufacturing defects

What Spartan Locker is right for YOU?

• Chrysler 8.25" with 29 spline axles, includes heavy-duty cross pin shaft  SL-C8.25-29
• Chrysler 8.25" with 27 spline axles, includes heavy-duty cross pin shaft  SL C8.25-27
• Nissan H233B Front with 31 Spline   SL NPATROL-31
• Nissan M226 Rear with 32 Spline   SL NTITAN-32
• Dana 30 Jeep JL M186 Differential   SL D30JL-27
• Dana 44HD differential with 30 spline axles, includes heavy-duty cross pin shaft     SL D44HD-30
• Dana 44 differential with 30 spline axles, includes heavy-duty cross pin shaft    SL D44-30
• Dana 44 differential with 19 spline axles, includes heavy-duty cross pin shaft   SL D44-19
• Dana 60 with 30 spline axles, includes heavy-duty cross pin shaft   SL D60-30
• Dana 60 differential with 35 spline axles, includes heavy-duty cross pin shaft   SL D60-35
• GM 12 bolt car & truck with 30 spline axles, includes heavy-duty cross pin shaft   SL GM12-30
• GM 8.5" with 28 spline axles, includes heavy-duty cross pin shaft   SL GM8.5-28
• GM 8.5" with 30 spline axles, includes heavy-duty cross pin shaft   SL GM8.5-30
• Suzuki Samurai differential with 26 spline axles   SL SUZSAM
• Model 20 differential with 29 spline axles, includes heavy-duty cross pin shaft   SL M20-29
• Model 35 differential with 27 spline axles and a 1.560" carrier, includes heavy-duty cross pin   SL M35-1.5-27
• Toyota 8" differential with 30 spline axles, includes heavy-duty cross pin shaft   SL T8-30
• Toyota 7.5" with 27 spline axles, includes heavy-duty cross pin shaft   SL T7.5-27
• Toyota V6 with 30 spline axles   SL TV6-30
• Ford 8.8", 31 spline, includes heavy-duty cross pin shaft   SL F8.8-31
• Ford 9", 28 or 31 spline   SL F9-28-31