Gear 4 Incorrect Ratio

Check these first

• Low or burnt transmission fluid
• A slipping fourth gear clutch pack
• A failing speed sensor
• A worn gear set or bearing
• A valve body restriction

What to do next

1. Check the fluid level and condition
2. Compare input and output speed on a scan tool
3. Read the commanded and actual ratio for fourth
4. Test the speed sensors for signal
5. Service the fluid and filter if the ratio is off
6. Clear the code and retest

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