Gear 7 Incorrect Ratio
While in 7th gear, the ratio measured between input shaft speed and output shaft speed does not match the calibrated value for that gear. Either a clutch or band is slipping, the wrong gear actually engaged, or speed sensor data is wrong.
Affected components
- Clutch pack
- Friction band
- Speed sensors
Common causes
- High likelihood: Slipping clutch in 7th gear element
- Medium likelihood: Wrong shift solenoid pattern engaging the wrong gear
Possible symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
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.