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Symptoms - Automatic Transmission

Symptoms - Automatic Transmission

Diagnostic Category Diagnostic Information
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
Noise and Vibration Diagnosis 
This category contains the following topics:
  • Ratcheting noise
  • Noise- drive gear, final drive, whine, growl, rattle, buzz, popping
  • 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
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
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
If no symptoms are found: