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Connection loss from engine to transmission
I have a 2017 Expedition (55,000 miles) I have had in the shop three different times (about 1100.00 spent) and no one has corrected the problem.
#1. Running down highway around 70 mph (with cruise off) when the loss occurred. Looking at the instrument panel where it tells us what gear it is in, starts flashing then shows 6th, 1st and after a few seconds’ returns to 6th and runs normal. No check engine light or orange wrench appears.
#2. At the bottom of a hill (about 35 mph) the car downshifts from 6th to 5th then to 4th and at this time we lose the connection. Instrument panel showing gears does the same thing as in #1. After letting off the accelerator for a few seconds everything returns to normal. No check engine or orange wrench.
#3. Making a turn (about 10 mph) I start to accelerate and again we lose the connection. Let off the accelerator pedal and after a few seconds and the instrument panel doing its thing all returns back to normal.
In summary it loses the electrical connection between the engine and transmission. The electrical part of the car searches for a gear until it finds it (about 5-10 sec) then everything runs normal.
#1. Running down highway around 70 mph (with cruise off) when the loss occurred. Looking at the instrument panel where it tells us what gear it is in, starts flashing then shows 6th, 1st and after a few seconds’ returns to 6th and runs normal. No check engine light or orange wrench appears.
#2. At the bottom of a hill (about 35 mph) the car downshifts from 6th to 5th then to 4th and at this time we lose the connection. Instrument panel showing gears does the same thing as in #1. After letting off the accelerator for a few seconds everything returns to normal. No check engine or orange wrench.
#3. Making a turn (about 10 mph) I start to accelerate and again we lose the connection. Let off the accelerator pedal and after a few seconds and the instrument panel doing its thing all returns back to normal.
In summary it loses the electrical connection between the engine and transmission. The electrical part of the car searches for a gear until it finds it (about 5-10 sec) then everything runs normal.
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Comments
I would start by pulling codes from the IPC and the ECM and then monitor the data in both of them while the problem is occurring. How often does this happen, is it likely to do it during a normal road test?