P0730 on Chevrolet
Incorrect Gear Ratio
P0730 on Chevrolet vehicles indicates incorrect gear ratio. Au7o has documented this code across 3 Chevrolet models — most commonly on Camaro, Sonic, Trailblazer. This code means the transmission computer detected that the actual gear ratio (calculated from input vs. output shaft speeds) does not match what it should be for the commanded gear. In other words, the transmission isn't delivering the correct gear, which often shows up as slipping, flaring RPM during shifts, or being stuck in the wrong gear. It can stem from internal mechanical wear, low or contaminated fluid, or faulty solenoids and sensors. The vehicle may shift harshly or enter limp mode. Typical repair costs on Chevrolet range from $2,000 to $4,000, depending on the specific model and root cause.
Common Causes of P0730
- •Low or contaminated transmission fluid
- •Worn clutches or bands (internal slipping)
- •Faulty shift solenoids
- •Dirty or sticking valve body
- •Faulty input or output speed sensor
- •Internal hydraulic/line pressure problems
- •Torque converter problems
- •General high-mileage transmission wear
P0730 on Chevrolet by Model
Chevrolet Camaro(1 issue)
- 10-Speed Transmission Wheel Lock-Up (10L80)2020-2022
Vehicles equipped with the 10-speed automatic transmission may experience momentary wheel lock-up when shifting from 8th to 5th gear. A transmission control valve is susceptible to premature wear, leading to pressure loss and potential wheel lock-up.
Chevrolet Sonic(1 issue)
- 6-Speed Automatic Transmission Turbine Shaft Fracture2012-2015
Chevrolet recalled 21,567 Sonics from 2012-2014 for a tendency of the turbine shaft to fracture inside the 6-speed automatic transmission. The turbine shaft transfers energy from the engine to the wheels, and when it fractures, the transmission fails completely. The problem typically appears past 70,000 miles and usually requires complete transmission replacement. The 2012-2015 models are most commonly affected.
Chevrolet Trailblazer(1 issue)
- CVT Transmission Shudder and Hesitation2021-2026
The Trailblazer with the 1.2L turbo and CVT automatic develops shudder during light acceleration and hesitation from stops. Some owners report a rubber-band feel typical of CVT calibration issues.
Looking for P0730 on a different make?
View P0730 across all makes →Frequently Asked Questions
What does P0730 mean on Chevrolet?▼
P0730 stands for "Incorrect Gear Ratio." This code means the transmission computer detected that the actual gear ratio (calculated from input vs. output shaft speeds) does not match what it should be for the commanded gear. In other words, the transmission isn't delivering the correct gear, which often shows up as slipping, flaring RPM during shifts, or being stuck in the wrong gear. It can stem from internal mechanical wear, low or contaminated fluid, or faulty solenoids and sensors. The vehicle may shift harshly or enter limp mode. On Chevrolet specifically, this code is documented across 3 models.
What causes P0730 on Chevrolet vehicles?▼
Common causes on Chevrolet: Low or contaminated transmission fluid, Worn clutches or bands (internal slipping), Faulty shift solenoids, Dirty or sticking valve body, Faulty input or output speed sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0730 on a Chevrolet?▼
Repair costs on Chevrolet range from $2,000 to $4,000, depending on the specific model and root cause.
Which Chevrolet models have P0730 documented?▼
Au7o has documented P0730 on 3 Chevrolet models: Camaro, Sonic, Trailblazer.