P076FGear 7 Incorrect Ratio
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P076F means the ratio in seventh gear is wrong: input speed divided by output speed does not match the commanded gear, so a clutch slips or another gear is engaged. It only exists on transmissions with seven or more gears. Ford's 10-speed 10R80 and 10R140 list it in bulletins together with the other ratio codes and the check engine light – causes include a migrating sleeve on a clutch cylinder causing hydraulic leaks and sticking valve body valves. Ford's ratio check elsewhere flags more than 30 rpm off for 1.8 s three times. On GM's Corvette with seven-speed manual gearbox, P076F is a plausibility check of the gear position sensor instead (ratio window 0.41–0.50), after one trip.
- What you may notice
- Slipping or flaring engine speed in seventh gear
- Harsh or delayed shifts
- Check engine light, transmission warning, possibly limp mode
- Likely causes
- LikelyHydraulic leak at the seventh gear clutch (Ford 10R80: clutch cylinder sleeve)
- PossibleSticking valves in the valve body or solenoid
- PossibleFluid level or condition
- PossibleGear position sensor implausible or not learned (GM manual only)
- RareTurbine or output speed sensor
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.