PowerBox 6-Speed
Case Finish
The PowerBox transmission only comes in a Show Polished finish. Special finishing is available and special charges due apply.
Shift Drum Options
Standard shift drum pattern (1-N-2-3-4-5-6)
N1 shift drum pattern (N-1-2-3-4-5-6)
Redundant Neutral System
Shift System
Our shift system with roller detent guarantees smooth shifts every time and our redundant neutral ensures that finding neutral is a easy chore. We mount a plunger detent on the left side pillow block and cut a plunger track into the shift drum itself. The plunger follows this track during operation (shifting) and when shifting into neutral pops into a pocket. This system lets you feel that you’re shifting into neutral. No more guessing. Shift drum features more aggressive timing on the fork groove profiles and is case hardened to 58 Rockwell for wear resistance and crisp shifts. We built our reputation on smooth shifting 6-speed transmissions; our drum designs benefit from the engineering lessons learned.
Power Box Internal View
Design
Design inspiration from the TorqueBox and coupled with our diamond ground 8620 gear steel 6-speed overdrive gearset gives the PowerBox an input torque capacity of 165 ft-lb, with a 400 ft-lb curb appeal; some may argue more. More because the tidy compact design of the Power Box makes the function Formed design elements pop out more.
Gearset
The PowerBox utilizes the OD6 gearset. Made out of 8620 steel, gears are shaper cut before heat treat then precision ground with diamond coated tooling after heat treat (58-62 Rockwell ‘C’). This extra steps ensures not only a quieter gear pair, but enables much tighter backlash control. This tighter control on the gears yield a silent operation.
Left Side Drive Power Box Layout
Right Side Drive Power Box Layout
Speedometer Pickup
The PowerBox has it’s speedometer pickup location in the middle of the case on the back side. The sensor reads off of the 4th gear. The electronic speedometer provision would utilize a stock 1996-2006 speed sensor, PN 74437-96 along with the .120″ spacer provided. Pending what type of electronic speedometer you use, an additional speedometer recalibration box might have to be purchased, BAKER PN 95E-56A.
Speed Sensor Pickup Location
Recalibration Box 95E-56B
The PowerBox come in a standard or R-Ratio gearset configuration
| Standard | Ratios |
| 1st Gear | 2.94 |
| 2nd Gear | 2.21 |
| 3rd Gear | 1.60 |
| 4th Gear | 1.23 |
| 5th Gear | 1.00 |
| 6th Gear | .86 |
| R-Ratio | Ratios |
| 1st Gear | 2.82 |
| 2nd Gear | 2.08 |
| 3rd Gear | 1.60 |
| 4th Gear | 1.23 |
| 5th Gear | 1.00 |
| 6th Gear | .86 |
Notes
- RSD comes with choice of 29 tooth zero offset pulley, 23 tooth or 24 tooth .2” chain sprocket
- RSD can be upgraded with various offset chain sprockets and sizes to suit application. No pulley option available due to tight actuator spider size
- LSD comes with choice of pulley or sprocket
- LSD can be upgraded to all pulley and chain sizes and offsets to suit application
Recommended Fluid / Level
Spectro Oil BD-75140
Picking the right transmission fluid ensures the life and durability of your transmission, that’s why BAKER recommends a fully synthetic GL-5 rated gear weight oil of 75W-140. If a GL-5 rated gear lube is not available, these commonly carried viscosities (weights) will work 75W-90, 75W-140 and 85W-140. BAKER does not recommend the use of Syn3 (20W-50).
For Bert Baker article on ‘Oil & Spiders’ Click Here
- PowerBox Fluid Capacity Dry: 22-24fl-oz
- PowerBox Fluid Capacity Wet: 18-22fl-oz
Standard Gear Case Finish Examples (Not Applicable To All Products)
 Chrome |  Polished |
 Raw |  Wrinkle Black |
These example finishes are intended to show the exterior treatments of cases, top covers and door
- SKU: 1
- MPN: PBR-5Z02
