Transfer Case Gear High Incorrect Ratio

Check these first

• A failed transfer case high gear position sensor
• Worn transfer case gears giving an incorrect high ratio
• A failed transfer case control module or solenoid
• Low or contaminated transfer case fluid

What to do next

1. Read the transfer case high gear ratio on a scan tool
2. Check transfer case fluid level and condition
3. Test the transfer case high gear position sensor
4. Command the transfer case through high range and watch the ratio
5. Replace the transfer case position sensor if the reading stays wrong
6. Clear the code and retest

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