Automatic Lockers

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      Gray Yukon 30-Spline GM 14-Bolt Grizzly Locker on a white background
      Yukon GM 14-Bolt Grizzly Locker - 10.5", 30 Spline
      $738.15
      Grizzly locker 14 bolt 4.10 down carrier on a white background
      GM 14 bolt 10.5 40 spline locker on a white background
      Yukon GM 14-Bolt Grizzly Locker - 10.5", 40-Spline, 4.10 & Down
      $767.60
      Dana 60 Grizzly locker 40 spline on a white background
      Yukon Dana 60 Grizzly Locker - 40 Spline, 4.56 & Up Ratio
      $1,067.80
      GM 11.5" Grizzly locker for 38 spline on a white background
      Yukon GM & Chrysler 11.5" Grizzly Locker - 38-Spline
      $1,738.50
      Jeep JK Dana 44 Grizzly Locker on a white background
      Yukon Jeep JK Dana 44 Grizzly Locker - Non-Rubicon, 30-Spline
      $927.20
      Yukon Grizzly locker Dana 30 axle traction upgrade on a white background
      Yukon Dana 30 Grizzly Locker - 30-Spline, 3.73 & Up
      $838.35
      GM 8.5" Grizzly locker 30 spline differential on a white background
      Yukon GM 8.5" & 8.6" Grizzly Locker - 30 Spline, 2.73 & Up
      $970.79
      heavy duty grizzly locker for Rockwell 2.5 ton axle on a white background
      Yukon Rockwell 2.5 Ton Grizzly Locker - 16 Spline
      $709.65

      Automatic lockers are one of the most effective traction upgrades available, automatically delivering power to both axle shafts when traction is needed without the complexity of air or electronic locker systems. Unlike an open differential that sends power to the wheel with the least resistance, automatic locking differentials help maintain forward momentum through rocks, mud, loose terrain, steep climbs, and other demanding off-road conditions. Popular in rock crawlers, rock bouncers, Ultra4 race cars, trail rigs, mud trucks, overland vehicles, and heavy-duty trucks, Yukon Grizzly Lockers feature forged cases, large internal locking teeth, and heavy-duty internals engineered to withstand oversized tires, low-range gearing, and high-horsepower applications. Available for axle platforms including Dana 30, Dana 44, Dana 60, GM 14-Bolt, GM 8.5", Chrysler 11.5", and Rockwell axles, these lockers provide a simple, durable, and proven solution for maximizing traction and drivetrain performance.

      Which Traction is Right for Your Build?

      Feature Steel Spool Automatic Locker Selectable Air Locker
      Traction 100% locked all the time Locks under power Driver controlled
      Street Manners Poor Moderate Best
      Off-Road Traction Maximum Excellent Excellent
      Turning Ability Most difficult Better than spool Best when unlocked
      Complexity Lowest Medium Highest
      Maintenance Lowest Moderate More components
      Best For Race-only, mud trucks, rock bouncers Trail rigs, crawlers, off-road trucks Dual-purpose rigs, overland, street/trail
      Cost Lowest Medium Highest

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