The GrudgeBox is a tough overdrive 6-speed to replace your stock 6-speed!
The GrudgeBox was engineered with a focus on excessive torque capacity and crisp shifting. All gears are straight cut in a way that ensures maximum power transfer to the rear wheel. This gearset was designed and geared for the everyday highway riders, speed freaks, and even racers!
Features
Built to take high horsepower abuse found in late model H-D performance applications while providing elegant shift precision.
All gears are straight cut for negligible parasitic power loss, providing maximum power transfer to the rear wheel
Wide-ratio gearing for heavier performance applications
Built for aggressive take-offs and long distances at above-average speeds
250 RPM drop at higher highway speeds (approx. 80 mph)
Engineering focus on excessive durability
Gears up to 40% wider than stock
Positive dog tooth engagement in gear with pie-shaped shift dogs
Frictionless linear detent shift system for smooth shifting
Redundant neutral detent to make it easy to find neutral
Low effort, single-axis/linear motion ratchet pawl for crisp, tight and easy shifting
More durable than stock
Typically no clearance is required- the gearset is designed to fit in an OEM case. On occasion, the case may require clearance due to OEM fluctuations in the case casting process.
2006-Later Dyna
2007-Later Softail & Touring*