Good evening,
I would start by verifying the fluid level.
https://www.2carpros.com/articles/automatic-transmission-problems
How long since you changed the fluid?
https://www.2carpros.com/articles/how-to-service-an-automatic-transmission
Beyond this, you may have a bad front pump or worn clutches in the transmission.
Roy
Transmission Cooling
Check Transmission Fluid Level and Condition
NOTICE: The vehicle should not be driven if the transmission fluid level indicator shows the transmission fluid below the minimum transmission fluid level mark or internal failure could result.
If the vehicle has been operated for an extended period of time, at highway speeds, in city traffic, in hot weather or while pulling a trailer, the transmission fluid may need to cool down to obtain an accurate reading.
The transmission fluid level reading on the transmission fluid level indicator will differ depending on operating and ambient temperatures. The correct reading should be within the normal operating temperature range.
Transmission Fluid Level Check
To check the transmission fluid level,
REFER to: Transmission Fluid Level Check See: Automatic Transmission/Transaxle > Procedures > Transmission Fluid Level Check (307-01 Automatic Transmission - 6-Speed Automatic Transmission - 6F35, General Procedures).
High Transmission Fluid Level
A transmission fluid level that is too high may cause the transmission fluid to become aerated due to the churning action of the rotating internal parts. This will cause erratic control pressure, foaming, loss of transmission fluid from the vent tube and possible transmission malfunction and/or damage. If an overfill reading is indicated,
REFER to: Transmission Fluid Level Check See: Automatic Transmission/Transaxle > Procedures > Transmission Fluid Level Check (307-01 Automatic Transmission - 6-Speed Automatic Transmission - 6F35, General Procedures).
Low Transmission Fluid Level
A low transmission fluid level could result in poor transmission engagement, slipping, malfunction and/or damage. This could also indicate a leak in one of the transmission seals or gaskets.
Transmission Fluid Condition Check
1. Check the transmission fluid level,
REFER to: Transmission Fluid Level Check See: Automatic Transmission/Transaxle > Procedures > Transmission Fluid Level Check (307-01 Automatic Transmission - 6-Speed Automatic Transmission - 6F35, General Procedures).
2. Hold the transmission fluid level indicator over a white facial tissue and allow the transmission fluid to drip onto the facial tissue and examine the stain.
3. If evidence of solid material is found, the transmission fluid pan should be removed for further inspection.
4. If transmission fluid contamination or transmission failure is confirmed by the sediment in the bottom of the transmission fluid pan, repair the transmission and clean the transmission fluid cooler tubes and the transmission fluid cooler.
5. If the transmission is to be overhauled or if installing a new transmission, the transmission fluid cooler must be backflushed.
REFER to: Transmission Fluid Cooler - Backflushing and Cleaning See: Fluid - A/T > Procedures > Transmission Fluid Cooler - Backflushing and Cleaning (307-02 Transmission Cooling - 6-Speed PowerShift Transmission - MPS6/6DCT450/6-Speed Automatic Transmission - 6F35, General Procedures).
Check
1. Refer to: Jacking and Lifting - Overview See: Vehicle Lifting > Procedures > Jacking and Lifting (100-02 Jacking and Lifting, Description and Operation).
Refer to: Engine Front Undershield See: Access Cover, Engine > Removal and Replacement > Engine Front Undershield (501-02 Front End Body Panels, Removal and Installation).
2. Start the engine and slowly select each gear position, stopping in each position and allowing the transmission to engage.
3. With the engine running in PARK on a level hoist make sure the transmission is at normal operating temperature 85-93° C (185-200° F). Check if the transmission fluid is even with the oil leveling plug hole.
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4. If the transmission fluid is not even with the oil leveling plug hole, add clean transmission fluid in increments of 0.25L (0.5 pt) until the transmission fluid is even with the oil leveling plug hole.
Material : Motorcraft(R) MERCON(R) LV Automatic Transmission Fluid (U.S.)/ XT-10-QLVC (U.S.) (WSS-M2C938-A) (MERCON(R) LV )
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5. Torque : 71 lb.in (8 Nm)
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Wednesday, July 8th, 2020 AT 3:37 PM
