Diagnostic Category
| Diagnostic Information
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The following table consists of eight 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.
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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:
• | No or incorrect gear selection |
• | Shift selector indicator does not match transmission gear range |
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Shift Quality (Feel) DiagnosisThis category contains the following topics:
• | Harsh, soft, delayed or slipping shifts |
• | Harsh, soft, or delayed engagement |
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Shift PatternThis category contains the following topics:
• | One forward gear missing or slipping |
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Shift Speed DiagnosisThis category contains the following topics:
• | Inaccurate or inconsistent shift points |
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Torque Converter DiagnosisThis category contains the following topics:
• | Torque Converter Diagnosis |
• | TCC apply/release quality |
• | Poor acceleration/No torque multiplication |
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• | Symptom not found or no symptom detected |
• | 4WD light does not illuminate |
• | Tow/Haul light does not illuminate |
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