P0734High urgency
Gear 4 Incorrect Ratio
Transmission · Gear Control
⛔ Transmission slippage in 4th gear. Service immediately.
What this means
4th gear actual ratio does not match expected — slippage in the 4th gear clutch pack.
Likely causes
- Worn 4th gear clutch packMost common
- Failed 4th gear solenoidCommon
Estimated repair cost
Transmission fluid service$100 – $250
Solenoid replacement$150 – $400
Transmission rebuild$1,500 – $5,000
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Frequently asked questions about P0734
What does P0734 mean?
4th gear actual ratio does not match expected — slippage in the 4th gear clutch pack.
Is P0734 serious?
Transmission slippage in 4th gear. Service immediately.
How much does it cost to fix P0734?
Repair costs for P0734 range from $100 – $250 depending on the root cause and your vehicle.
Can I drive with P0734?
No — this code indicates a serious issue. Stop driving and have the vehicle inspected immediately.