Description
Baker Drivetrain Grudgebox Builders Kit fits 2006 and newer Harley Dyna, Softail, and Touring models.
First, choose model year, finish, and shifter design below.
The standard shift pattern is the same as stock. In addition, the N1 shift pattern places neutral down with 1–6 up. Alternatively, the N1 reverse pattern features all downshifting and is designed for racers.
Built to take high-horsepower abuse found in late-model H-D performance applications, this transmission also provides elegant shift precision.
Transmission Configurations
GrudgeBox – Straight 1st, 2nd, 3rd, 4th, 5th, and 6th gears, designed and geared for performance buffs, racers, and speed-focused riders seeking negligible power loss.
Additionally, all gears are straight cut for negligible parasitic power loss, which provides maximum power transfer to the rear wheel. Furthermore, wide-ratio gearing supports heavier performance applications.
As a result, this transmission is built for aggressive take-offs and long distances at above-average speeds. For example, there is an approximate 250 RPM drop at higher highway speeds (around 80 mph).
Engineering & Durability Features
Overall, the engineering focus is on excessive durability.
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Bulletproof main drive gear bearing (patent pending)
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Gears up to 40% wider than stock
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Positive dog tooth engagement with pie-shaped shift dogs
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Frictionless linear detent shift system for smooth shifting
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Redundant neutral detent for easier neutral selection
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Low-effort, single-axis linear-motion ratchet pawl for crisp, tight, and easy shifting
Finally, this transmission is more durable than stock and requires no case modifications for installation.
