Powertrain, generic · Transmission

P07F6 Gear 9 Incorrect Ratio

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

A ratio code compares input or turbine speed divided by output speed with the ratio of the commanded gear; a slipping clutch or the wrong gear trips it. Ford's summaries describe the check (over 30 rpm off for more than 1.8 s, three times) for gears 1–6 only; its 10-speed bulletins show gears 7–10 as P076F, P07D9, P07F6 and P07F7. P07F6 covers 9th gear. Ford's 10R80 bulletins from 2023 to 2025 (F-150, Mustang, Ranger, Explorer, Transit, Expedition) list it with the other ratio codes; the causes are adaptive learning, the valve body and a migrating clutch cylinder sleeve. The 10R140 bulletin of 2021 does not mention it. Nissan's nine-speed Frontier and Titan set it with the MIL on; the repair check drives each gear 1–9 for at least 10 s in manual mode.

Likely causes

Clutch slipping or hydraulic leak (Ford 10R: migrating sleeve in the CDF clutch cylinder)
Shift adaptives wrong or not learned
Sticking valve in the valve body
Fluid level low or fluid degraded
Turbine or output speed sensor signal wrong

Symptoms

  • Slipping or flaring engine speed in gear 9
  • Harsh or delayed shifts
  • Check engine or transmission warning lamp
  • Gear 9 locked out, higher rpm at cruise

Repair estimate

DifficultyHardWorkshop job
Parts and labour€150–4,500
Time0–14 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

transmission clutchestransmission valve bodytransmission fluidtransmission control module

Related codes

P07D9P07F7P07F8P07F9P0730

References: static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov, fordservicecontent.com.