Built to take high horsepower abuse found in late model H-D performance applications while providing elegant shift precision.
GrudgeBox - Straight 1st, 2nd 3rd, 4th, 5th and 6th gears, design and geared for performance buffs, racers and speed freaks seeking negligible power loss.
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
Bulletproof main drive gear bearing (patent pending)
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
