For 1990-2009 cars

Check | Causes
--- | ---
DEFINITION: Harsh shift feel - an unacceptable quick gear change occurs.
Pressure Control Solenoid |

• | Damaged O-rings

• | Contamination

Output Speed Sensor | Open or grounded circuit
Input Speed Sensor | Open or grounded circuit
Throttle Position | Open or grounded circuit
Forward Clutch Assembly |

• | Damaged or worn clutch plates

• | Damaged or cut piston

• | Damaged or stuck ball check valve

Control Valve Body Accumulator Assembly |

• | Accumulator piston stuck

• | Stuck or missing ball check valves

Fluid Pump |

• | Pressure regulator valve stuck

• | Pressure regulator valve spring

• | Line boost valve spring

• | Line boost valve or bushing stuck, damaged or incorrectly assembled

• | Fluid pump screen assembly plugged or damaged

• | Fluid pump rotor guide omitted or misassembled

• | Fluid pump rotor cracked or broken

• | Porosity in fluid pump

• | Fluid pump surfaces not flat

• | Excessive fluid pump rotor clearance

• | Pump slide seal out of location

• | Pump vanes damaged

• | Pump slide spring damaged

Inspect for active transmission DTCs | Transmission DTC default action active