Symptom Diagnosis
Diagnostic Category
| Diagnostic Information
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DEFINITION: This table consists of 9 diagnostic categories that are located in the left 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 column to locate the specific symptom diagnostic information.
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Fluid DiagnosisThis category contains the following topics:
• | Fluid condition: appearance, contaminants, smell, overheating |
• | Line pressure: high or low |
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Noise and Vibration DiagnosisThis category contains the following topics:
• | Noise: drive gear, final drive, whine, growl, rattle, buzz, popping |
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Range Performance DiagnosisThis category contains the following topics:
• | Shift selector indicator does not match transmission gear range |
• | Lack of power or hesitation |
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Shift Quality (Feel) DiagnosisThis category contains the following topic:
• | Harsh, soft or slipping shifts |
• | Harsh, soft or delayed engagement |
• | Shift shudder, flare or tie-up |
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Shift PatternThis category contains the following topics:
• | Gear missing or slipping |
• | No upshift or slipping upshift |
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Shift Speed DiagnosisThis category contains the following topic:
Inaccurate or inconsistent shift points
| Refer to
Inaccurate Shift Points
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Torque Converter DiagnosisThis category contains the following topics:
• | Torque converter diagnosis |
• | TCC apply/release quality |
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Indicator On or Message Center Displays MessageThis category contains the following topics:
Message Center displays "change trans fluid"
| Refer to
Transmission Component and System Description
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If symptom is not found
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