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.
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 or Delayed Engagement and Shifts (TSB 22-2428)2020-2023
Some 2020-2023 Lincoln Aviators equipped with a 10R60 and built on or before December 23, 2022, or a 10R80 MHT and built on or before August 15, 2022, may have harsh or delayed engagement and/or harsh or delayed shifts. Ford TSB 22-2428 says the condition may involve PCM/TCM software, the transmission solenoid-ID strategy, sticking main-control valves, or axial movement of the CDF clutch-cylinder sleeve. The complaint may occur with or without a malfunction indicator and the bulletin's listed transmission DTCs. The symptom alone does not select a valve body, CDF cylinder, or complete transmission.
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View P07D9 across all makes →Frequently Asked Questions
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 vary widely depending on the root cause and specific Lincoln model.
Which Lincoln models have P07D9 documented?▼
Au7o has documented P07D9 on 1 Lincoln model: Aviator.