Transfer Case Gear High Incorrect Ratio
When the transfer case is in High range the measured input/output speed ratio does not match the expected value. Worn chain or planetary set.
Affected components
- Transfer case
- Planetary gear set
Common causes
- High likelihood: Stretched transfer case chain
- Medium likelihood: Worn planetary gear set
Diagnostic notes
- The malfunction indicator lamp may illuminate
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.