P0730
High SeverityIncorrect Gear Ratio
Transmission System
What Does P0730 Mean?
The TCM detects that the actual gear ratio does not match the commanded gear.
Common Fix
Transmission fluid service or rebuild
Estimated Cost (DIY)
$50 - $3,000
Symptoms
- β οΈTransmission slipping
- β οΈRPM flares during shifts
- β οΈHarsh engagement
- β οΈCheck engine light
Common Causes
Low or burnt transmission fluidlikely
Worn clutch packspossible
Faulty shift solenoidpossible
Internal transmission damagepossible
How to Diagnose P0730
- 1Check transmission fluid level and condition
- 2If fluid is dark/burnt, service transmission
- 3Check for specific solenoid codes
- 4Transmission may need rebuild if fluid is OK
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Frequently Asked Questions
- Is P0730 a death sentence for the transmission?
- Not necessarily β it could be as simple as low fluid. Check fluid first. If fluid is fresh and full, internal wear is more likely.
- How much does a transmission rebuild cost?
- Professional rebuild: $1,500-$3,500. Remanufactured transmission: $1,000-$2,500. Always check fluid first.
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