For 1990-2009 cars

Condition | Action
--- | ---
DEFINITION: No 2-3 upshift
Park/neutral position switch (72) |

• | Perform functional test on the park/neutral position switch (72).

• | Replace park/neutral position switch (72) if fails test.

Transmission control module (TCM) |

• | Inspect for operation of TCM and correct calibration.

• | Re-cal TCM if necessary.

• | Replace the TCM if faulty.

Valve body (39) | Replace the valve body (39).
Internal transmission part failure |

• | Disassemble the transmission and inspect the following:

- | Clutch assembly, O-rings cut or damaged, clutch disc failure.

- | Fluid pump worn or scored components

- | Broken shafts or gears

• | Replace transmission if any internal parts are faulty.