Automotive Flow Chart

Transmission Diagnostic Flowchart

A comprehensive troubleshooting guide for transmission issues, covering fluid conditions, shifting problems, pressure diagnostics, and transmission control module (TCM) analysis

flowchart TD
    A[Transmission Issue] --> B[Type of Problem]
    B -->|No Shift| C[Check Fluid]
    B -->|Hard Shift| D[Check Pressure]
    B -->|Slipping| E[Check TCM Codes]

    C -->|Low| C1[Check Level/Leaks]
    C -->|Burnt| C2[Internal Inspection]
    C -->|Contaminated| C3[Flush System]
    C1 -->|Leak Found| C4[Repair Leak]
    C2 -->|Damaged| C5[Rebuild Required]

    D -->|High Pressure| D1[Check Solenoids]
    D -->|Low Pressure| D2[Check Pump]
    D -->|Erratic| D3[Check Valve Body]
    D1 -->|Failed| D4[Replace Solenoids]
    D2 -->|Worn| D5[Replace Pump]

    E -->|Has Codes| E1[Check Sensors]
    E -->|No Codes| E2[Check Mechanicals]
    E -->|Intermittent| E3[Road Test]
    E1 -->|Bad Sensor| E4[Replace Sensor]
    E2 -->|Wear Found| E5[Overhaul Trans]