For 1990-2009 cars

Diagnostic Category | Diagnostic Information
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Important: The Functional Test Procedure should be performed before beginning any diagnosis. If this procedure has not already been performed, refer to Functional Test . 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 Fluid Foaming .

• | Refer to High or Low Line Pressure .

• | Refer to Fluid Leak Diagnosis .

• | Refer to Fluid Leaks .

#### 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 Ratcheting Noise .

• | Refer to Noise .

• | Refer to Flexplate/Torque Converter Vibration Test .

• | Refer to Vibration .

#### Range Performance Diagnosis

This category contains the following topics:

• | Drives in Neutral

• | No Park

• | No Reverse

• | No Drive

• | Loss of power

• | No engine braking

• | Shift indicator indicating wrong gear

• | No gear selection

• | Refer to Drives in Neutral .

• | Refer to No Park .

• | Refer to No Reverse or Slips in Reverse .

• | Refer to Loss of Drive .

• | Refer to Loss of Power .

• | Refer to Engine Stall .

• | Refer to No Engine Braking; All Manual Ranges .

• | Refer to No Engine Braking; Manual First - First Gear .

• | Refer to No Engine Braking; Manual Second - Second Gear .

• | Refer to Shift Indicator Indicates Wrong Gear Selection .

• | Refer to No Gear Selection .

#### Shift Quality (Feel) Diagnosis

This category contains the following topic:

Harsh shifts

Refer to Harsh Shifts .

#### Shift Pattern

This category contains the following topics:

• | One forward gear only

• | Specific forward gears only

• | Slipping

• | Refer to Second Gear Only .

• | Refer to First and Second Gears Only .

• | Refer to First and Fourth Gears Only .

• | Refer to Second and Third Gears Only .

• | Refer to Third and Fourth Gears Only .

• | Refer to No First Gear, Slips in First Gear .

• | Refer to No Second Gear, Slips in Second Gear .

• | Refer to No Third Gear, Slips in Third Gear .

• | Refer to No Fourth Gear, or Slips in Fourth Gear .

#### Shift Speed Diagnosis

This category contains the following topic:

Inaccurate or inconsistent shift points

Refer to Inaccurate/Inconsistent Shift Points .

#### Torque Converter Diagnosis

This category contains the following topics:

• | Torque Converter Diagnosis

• | TCC remains engaged

• | TCC application while engine is cold

• | TCC shudder

• | Engine stalling

• | Refer to Torque Converter Diagnosis .

• | Refer to No Torque Converter Clutch (TCC) Release .

• | Refer to Torque Converter Clutch (TCC) Apply with Cold Engine .

• | Refer to Torque Converter Clutch Shudder .

• | Refer to Engine Stall .