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Detroit Gearless differential

The power of lockers isn't just for the big rigs. The serious traction provided by Eaton's Gearless Locker dramatically changes both the fun and function of any ATV. Gearless is a speed sensitive automatic locking differential. It powers both wheels, yet automatically permits differential operation to compensate for wheel speed differences that occur when making a turn or driving over obstacles. By eliminating individual wheel spin-out you will be able to go new places and work on a much greater range of driving surfaces.

Light Utility Vehicles (LUV) that haul loads on construction sites, golf courses and factory floors can also benefit from the smooth locking operation of the Detroit Gearless Locker. This durable and reliable locker increases traction performance on any surface including slippery mud, wet pavement, loose dirt and ice.

The Detroit Gearless Locker doesn't rely on internal gear teeth, so noise is almost non existent. Instead, the units locking power relies on high strength clutch discs energized by a Tunkenel-V Power Driver cross pin.

Speed sensitive automatic locking
For ATVs, utility vehicles, golf carts, farm vehicles and more
High strength clutch discs are smooth and quiet


  • Provides a fully locked axle that automatically unlocks when wheel speeds are mismatched
  • Simple, proven design
  • Smooth and quiet operation
  • Eliminates wheel spin-out and improves handling
  • Transparent function to the vehicle operator

Detroit Gearless operation

The Gearless Locker has left and right clutch housing that are coupled to the side gear through a set of friction plates. The drive pin that is fixed to the differential support case is located between the two clutch housings. Each clutch housing has 'V' grooves where the drive pin is nested. When the differential support case and drive pin rotate, the drive pin runs up the ramp of the 'V' grooves and separates the two clutch housings. This motion squeezes the friction plates together or 'energizes', the torque flow travels from the differential support case through the components to the axle and wheels.

When driving straight, in either forward or reverse, both friction packs are energized and 50% of the torque flows to each drive wheel. However, when driving in a turn, the friction pack for the outside wheel is de-energized and 100% of the available torque is transmitted to the inside drive wheel. The faster turning (outside) wheel overruns, until both wheel speeds match and the Gearless Locker automatically re-energizes to the fully locked position.

Detroit gearless expanded view