Vehicle Speed - Output Shaft Speed Correlation

Check these first

• A mismatch between the vehicle speed and output shaft speed signals
• A failed vehicle speed sensor or output shaft speed sensor
• Incorrect sensor wiring or installation
• A worn output shaft or transmission component
• A fault in the TCM or transfer case module

What to do next

1. Read the vehicle speed and output shaft speed on a scan tool
2. Compare the two signals through a test drive
3. Check the sensor wiring and connectors
4. Inspect the output shaft speed sensor for damage
5. Replace the faulty speed sensor if the wiring tests good
6. Clear the code and retest

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