COMPUSHIFT Mini Manual – COMPUSHIFT Mini Manual
Preparing for Your Installation
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1 Preparing for Your Installation
1.1 Vehicle Preparation
Prior to installation, you should ensure that your powertrain, engine, transmission, drive shaft, rear axle, are all in
good working condition.
The vehicle's electrical system should be properly maintained and working correctly. Battery voltage should be 14.4
- 14.7 volts while the engine is running.
The transmission should shift smoothly and correctly through its gears, and the shift linkage should be correctly
adjusted.
Your transmission must have a properly-calibrated speedometer gear.
COMPUSHIFT Mini uses the industry standard 1000 turns per mile speedometer cable speed to determine
speed.
1.2 A Word About Adjusting the TV Cable
A properly-adjusted TV cable can make a world of difference in transmission and engine performance.
Two things are important for setting the TV cable:
Removing the slack
Proper slack in the cable means that the cable has a little bit of tension with the throttle is closed, but
no so much that it changes in the main line pressure.As soon as the throttle starts to open, the line
pressure should start to increase.
Proper travel in the cable means that the cable extends its full range when the throttle is moved to
the fully open position, but no further.
Setting the travel
If the cable fails to move the full range, then full line pressure won't be reached, the transmission
may slip, and also the shift points may be too low.
A cable that moves too much will cause hard shifts that are too soon, can break the linkage in
transmission, and can also prevent achieving a fully open throttle.
COMPUSHIFT Mini cannot properly operate a malfunctioning transmission. A malfunctioning
transmission may damage COMPUSHIFT Mini and void your warranty.
Your transmission must be properly installed and in good mechanical condition before using COMPUSHIFT
Mini.
A qualified transmission repair shop can inspect, clean, install, and/or rebuild your transmission as
required.
If you have any questions about the condition or type of transmission, please contact a qualified
transmission repair facility, HGM Headquarters, or one of our distributors for a recommendation.