P07D9 on Lincoln
Gear 8 Incorrect Ratio
P07D9 on Lincoln vehicles indicates gear 8 incorrect ratio. Au7o has documented this code across 1 Lincoln model — most commonly on Aviator. This code sets when the transmission control module compares input speed to output speed and finds that the ratio measured in 8th gear does not match the expected value. Essentially the transmission cannot achieve or hold the correct 8th-gear ratio, indicating slippage or an engagement problem in that gear. You may feel slipping, flaring, or the transmission failing to reach or hold 8th gear. This usually points to an internal mechanical or hydraulic transmission issue. Typical repair costs on Lincoln range from $800 to $7,000, depending on the specific model and root cause.
Common Causes of P07D9
- •Worn or slipping clutches/bands for 8th gear
- •Low or degraded transmission fluid
- •Stuck or faulty shift/pressure control solenoid
- •Valve body wear or internal hydraulic leaks
- •Faulty input or output speed sensor
- •Internal transmission mechanical wear
- •Failing transmission control module (less common)
P07D9 on Lincoln by Model
Lincoln Aviator(1 issue)
- 10R60/10R80 MHT Harsh/Delayed Shifts from Sticking Valve Body and CDF Clutch Sleeve Movement2020-2023
Many 2020-2023 Aviators with the 10R60 10-speed automatic (3.0L EcoBoost) and 10R80 MHT (Grand Touring PHEV) exhibit harsh 1-2/2-3 upshifts, clunky engagements into Drive or Reverse, and delayed shifts, with or without illuminated MIL. Root cause per Ford TSB 23-2250 is software/solenoid ID strategy, sticking valves in the main control valve body, and/or axial movement of the CDF clutch cylinder sleeve. Ford issued multiple TSBs (21-2316, 22-2102, 22-2428, 23-2250, 24-2046) and a related 10R80 class action is active in 2025 for sibling Ford/Lincoln models.
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What does P07D9 mean on Lincoln?▼
P07D9 stands for "Gear 8 Incorrect Ratio." This code sets when the transmission control module compares input speed to output speed and finds that the ratio measured in 8th gear does not match the expected value. Essentially the transmission cannot achieve or hold the correct 8th-gear ratio, indicating slippage or an engagement problem in that gear. You may feel slipping, flaring, or the transmission failing to reach or hold 8th gear. This usually points to an internal mechanical or hydraulic transmission issue. On Lincoln specifically, this code is documented across 1 model.
What causes P07D9 on Lincoln vehicles?▼
Common causes on Lincoln: Worn or slipping clutches/bands for 8th gear, Low or degraded transmission fluid, Stuck or faulty shift/pressure control solenoid, Valve body wear or internal hydraulic leaks, 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 P07D9 on a Lincoln?▼
Repair costs on Lincoln range from $800 to $7,000, depending on the specific model and root cause.
Which Lincoln models have P07D9 documented?▼
Au7o has documented P07D9 on 1 Lincoln model: Aviator.