For 1990-2009 cars

Diagnostic Category | Diagnostic Information
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DEFINITION: The following table consists of seven diagnostic categories that are located in the left-hand column. Using this column, choose the appropriate category based on the operating conditions of the vehicle or transmission. After selecting a category, use the right-hand column to locate the specific symptom diagnostic information.

#### Fluid Diagnosis

This category contains the following topics:

• | Fluid condition - appearance, contaminants, smell, overheating

• | Line pressure - high or low

• | Fluid leaks

• | Refer to Transmission Fluid Check .

• | Refer to Line Pressure Check .

• | Refer to Fluid Leak Diagnosis .

#### Noise and Vibration Diagnosis

This category contains the following topics:

• | Ratcheting noise

• | Noise - drive gear, final drive, whine, growl, rattle, buzz, popping

• | Vibration

• | Refer to No Park or Ratcheting Noise in Park .

• | Refer to Flexplate/Torque Converter Vibration Test .

• | Refer to Diagnostic Starting Point - Vibration Diagnosis and Correction .

#### Range Performance Diagnosis

This category contains the following topics:

• | No Park

• | No Reverse

• | No Drive

• | No engine braking

• | No gear selection

• | Refer to No Park or Ratcheting Noise in Park .

• | Refer to No Reverse or Slips in Reverse .

• | Refer to Unable to Run in All Ranges .

• | Refer to No Engine Braking or 3-2-1 Manual Downshift .

• | Refer to Shift Cable Replacement .

#### Shift Quality/Feel Diagnosis

This category contains the following topic:

Harsh shifts

Refer to Harsh Engagement into any Drive Range .

#### Shift Pattern

This category contains the following topics:

• | One forward gear only

• | Slipping

• | Refer to First Gear Only .

• | Refer to No 2-3 Shift or 2-3 Shift Slipping .

• | Refer to Slips in First Gear .

• | Refer to Slipping or Harsh 1-2 Shift .

#### Shift Speed Diagnosis

This category contains the following topic:

Inaccurate or inconsistent shift points

Refer to High or Low Shift Points .

#### Torque Converter Diagnosis

This category contains the following topic

Torque Converter Diagnosis

Refer to Flexplate/Torque Converter Vibration Test .

If no symptoms are found |

• | Refer to Transmission Fluid Check .

• | Refer to Road Test .

• | Refer to Line Pressure Check .