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It is not usually necessary to optimize the 3-4 shift point (unless
the gearing in the vehicle causes the shift to occur during the 1/4-
mile run) because it will occur at a speed so high that it is out of
range, even on a race track. However, if gearing is causing either
the 2-3 or the 3-4 shift to occur
just before the end of the 1/4-mile,
you should try raising the shift point enough to allow the vehicle
to cross the finish line without making that last shift.
The highest shift point RPM you can use must always
be less than the rev limit RPM.
If you do hit the rev limit,
the computer will shut the fuel off until RPM drops sufficiently,
so let off the throttle and abort that test run. The rev limiter is
there to protect your valve-train and the engine from damage.
Even if you went quicker every time you raised the shift point
RPM, stop at 100 RPM below the rev limit. That’s the
most
RPM you can use safely for that shift point.
• This is the first screen you will see:
• If you press ‘Y’, you will see the following screen:
• Press the
▲ arrow once for 1 MPH, twice for 2 MPH, etc. and
then press the ‘Y’ button to enter your 1-2 shift point choice.
If you don’t want to change the 1-2 shift point, enter a zero,
and press ‘Y’.
The automatic transmission shift point adjustment range is:
1-2 shift: +/-6 MPH (In 1 MPH increments)
2-3 shift: +/-12 MPH (In 1 MPH increments)
3-4 shift: +/-18 MPH (In 1 MPH increments)
After downloading the 1-2 shift point you want to test,
disconnect the programmer and make your test runs (At least
three (3), but as many as needed to get three (3) good runs for
averaging.). If you’ve seen a gain, continue moving in that
direction until you begin to slow down or until you are within
100 RPM of the rev limiter. You can now review all of your
test results, select the best 1-2 shift point for your vehicle,
and program it in. If two (2) different shift points run the same
average e.t.’s, use the lower MPH and RPM to save wear and tear
on the vehicle. Repeat the same procedure for the 2-3 shift and
the 3-4 shift.
TO ADJUST TRANSMISSION SHIFT POINTS, PRESS Y
TO KEEP STOCK SHIFT POINTS, PRESS N
USE UP/DOWN ARROWS TO ADJUST SHIFT POINTS, THEN PRESS Y TO SELECT OR N TO EXIT.
1-2 SHIFT +0 MPH
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