For 1990-2009 cars

Condition | Action
--- | ---
DEFINITION: Harsh shift felt when shifting from park to neutral into reverse
Fluid level low and/or burnt |

• | Perform Transmission Fluid Check .

• | If low inspect for fluid leak, repair as necessary.

• | Inspect transmission oil cooler system for restricted or kinked lines.

• | Flush system. Refer to Transmission Fluid Cooler Flushing and Flow Test .

Fluid is contaminated with water or engine coolant | If contaminated with engine coolant replace transmission.
Unit filled with wrong type of fluid | Drain fluid and fill with proper type of fluid.
Input speed sensor (76) |

• | Perform electrical function test on the input speed sensor (76).

• | Replace the input speed sensor (76) 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.

Engine or transmission mounts |

• | Inspect the engine mounts and the transmission mounts for wear or loose mounting fasteners.

• | Replace any faulty engine or transmission mounts or loose fasteners.

Engine malfunction |

• | Ensure engine is operating properly.

• | Repair engine to operate properly.

Drive shafts |

• | Inspect the drive shafts for worn components.

• | Repair the drive shaft if worn.

Suspension system |

• | Inspect suspension components.

• | Replace faulty suspension components.

Transmission oil temperature sensor (32) |

• | Perform function test on the transmission oil temperature sensor (32).

• | Replace the automatic transmission wiring harness assembly (78).

Line pressure control solenoid valve assembly (SLT) (312) |

• | Perform electrical function checks on the line pressure control solenoid valve assembly circuit.

• | Perform electrical function check on the line pressure control solenoid valve assembly (312).

• | Replace valve body assembly (39) if line pressure control solenoid valve assembly is faulty.

Transmission control module (TCM) |

• | Perform function test on the TCM.

• | Replace TCM if fails function test.

Valve body (39) | Replace valve body (39).
Internal transmission parts |

• | Disassemble the transmission and inspect for the following:

- | Missing retaining rings

- | Worn or broken thrust needle bearings and thrust washers

- | Differential assembly backlash

- | Worn drive and driven gears

- | Worn planetary gear assemblies

• | Replace the transmission if any faulty parts.