For 1990-2009 cars

Important: Use the symptom tables only if the following conditions are met:

• | Refer to Diagnostic Starting Point - Vehicle .

• | There are no DTCs set.

• | The control modules can communicate via the serial data link.

• | Review the system operation in order to familiarize yourself with the system functions. Refer to Transmission General Description and Transmission Component and System Description.

### Visual/Physical Inspection

Inspect the easily accessible or visible system components for obvious damage or conditions which may cause the symptom.

### Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

### Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

• | Fluid Diagnosis

- | Transmission Fluid Check.

- | Fluid Pressure High or Low.

- | Automatic Transmission Fluid Leaks.

- | Fluid Leak Diagnosis.

• | Noise and Vibration Diagnosis

- | Whine/Growl Noise That Changes with Vehicle Speed.

- | Noise in First or Reverse Gear.

- | Noise in First, Second, Third, Fourth, Fifth, or Reverse Gear.

- | Noise in First, Second, Sixth, or Reverse Gear.

- | Noise in Second or Sixth Gear.

- | Noise During 3-4 or 4-3 Shifts.

- | Noise in Fourth, Fifth, or Sixth Gear.

- | Vibration.

- | Vibration in Second, Third, Fourth, Fifth, or Sixth Gear.

- | Flex Plate/Torque Converter Vibration Test.

- | Noise and Vibration Analysis.

• | Range Performance Diagnosis

- | No Park or Drive.

- | No Drive in All Ranges.

- | No Reverse Gear.

- | No Drive or Reverse Gear.

• | Shift Quality Feel Diagnosis

- | Harsh Garage Shift.

- | Harsh, Soft, Delayed or Slipping First or Reverse Gear.

- | Harsh, Soft, Delayed or Slipping 1-2-3-4 Shift.

- | Harsh, Soft, Delayed or Slipping 4-5-6 Shift.

- | Harsh, Soft, Delayed or Slipping Third, Fifth, or Reverse Gear.

- | Harsh, Soft, Delayed or Slipping Second or Sixth Gear.

• | Shift Pattern

- | No First Gear.

- | No First and Reverse Gears.

- | No First, Second, Third, and Fourth Gear.

- | No First, Second, Third, Fourth, Fifth, or Reverse Gear.

- | No Second and Sixth Gear.

- | No First, Second, Sixth, or Reverse Gear.

- | No Fourth, Fifth, and Sixth Gear.

- | No Third, Fifth, and Reverse Gear.

- | Stuck in Second or Sixth Gear.

- | Stuck in First or Reverse Gear.

• | Torque Converter Diagnosis

- | Torque Converter Diagnosis.

- | No Torque Converter Clutch Apply.

- | No Torque Converter Clutch Release.

• | Symptom Not Found or No Symptom Detected

- | Transmission Fluid Check.

- | Road Test.

- | Line Pressure Check.