Get Proven Traction with USA Standard Gear Spartan Lockers or Helical Limited Slip Differential

Traction is the name of the game, and USA Standard Gear has two ways you can get it. Pick the one that works best for you.

Spartan Lockers
Spartan mechanical lockers are the familiar ‘lunchbox’ style design that replaces the spider gears in open differential carriers. The difference is the Spartan has a revolutionary spring and pin design to make installation a snap—no thrust washers here—and heat-treated, high-nickel 9310 chromoly steel internals for added strength. Spartan Lockers are available for the following axles:
• Dana 30, 35, 44, and 60
• Ford 8, 8.8, and 9 inch
• GM 8.5 and 8.875 truck
• AMC Model 20
• Chrysler 8.25 inch
• Nissan H233B and M226
• Suzuki 6.9 inch
• Toyota 7.6, 8, 9.5 inch and V6 axle

Spartan Helical Limited Slip for Jeep Dana 30
Made for Dana 30 front differentials found on popular Jeep vehicles, the Spartan Helical Limited Slip uses floating helical-cut worm gears that operate in pockets and mesh together. Under normal driving conditions the Spartan acts like an open differential. When acceleration or wheel slippage occurs, thrust is applied to the gear pinions and transfers torque to the tire with the best traction in a progressive manner for smooth engagement with very little noise.

Spartan Helical Limited Slip has a forged 8620 grade steel case and internal parts. The 10-pinion design is stronger than similarly-sized 6- or 8-pinion units, and there are no clutches to rebuild or replace. It fits cases for 3.73 and up gear sets and 27-spline axle shafts

SEE USA STANDARD GEAR’S SPARTAN LOCKER AND HELICAL LIMITED SLIP AT SUMMIT RACING