For 1990-2009 cars

Condition | Action
--- | ---
DEFINITION: Transmission is not shifting within the shift parameters or not shifting the same under similar conditions.
Output speed sensor (74) |

• | Perform electrical function test on the output speed sensor (74).

• | Replace the output speed sensor (74) if fails electrical function test.

Park/neutral position switch (72) |

• | Inspect park/neutral switch (72) for proper alignment.

• | Align the park/neutral switch (72) if not properly aligned.

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

• | Replace the park/neutral position switch (72) if faulty.

Transmission control module (TCM) |

• | Perform function test on the TCM.

• | Replace TCM if fails function test.

Valve body (39) | Replace valve body (39).