Baker GrudgeBox GB6-M803 Transmission 6 Speed Black Door Standard Shift 17-26 M8 Touring

Baker GrudgeBox Transmission 6 Speed Black Door Standard Shift 17-26 M8 Touring

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!

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. 

The GrudgeBox has different gear ratios than the stock transmission (except GrudgeBox 5th gear is the same as stock 6th gear, 1:1). This changes the input to the ECM. The 42-tooth reluctor ring in the GrudgeBox compensates to correct the speedometer within ± 2 mph with no re-flash to the ECM. However, the gear indicator and cruise control may only operate in 5th gear. To correct the gear indicator in all gears and enable cruise control in 3rd, 4th, and 6th, an ECM re-flash is required. Existing tuners must have an option to modify transmission gear ratios in order to re-flash the ECM. BAKER Drivetrain offers re-flash values for Powervision, ThunderMax, TTS, and Techno Research tuners.  Click here for the GrudgeBox Recalibration Values