Shift point adjusments are only in effect at wide open throttle. Optimum settings can vary based on the driver’s feel. It is best to start by raising the shift points in each gear in small increments, and test driving the vehicle. Here are some tips for adjusting shift points:
For Maximum Performance: To optimize shift points for maximum acceleration, the shift points should be raised or lowered in each gear, until the quickest acceleration rate is found. The best, and most accurate way, to measure acceleration is at a dragstrip with a timing system. Start out with the stock shift points as a baseline. Adjust the 1-2 shift first, going up or down in 100 RPM increments. Once you have found the shift point that gives you the quickest time, then repeat the same procedure for the rest of the gear changes.
For Driver Feel: Most of the time, shift points can be tailored to the driver’s preference. For example, if the vehicle seems to shift too soon while passing at full throttle, the shift point at that gear change can be raised. The best method is trial and error.