How does the engine power seem? Here is the turbine shaft speed sensor location of the f150 but I think you may have a shift solenoid "B" that is not working correctly. Here is the location so you can test it by putting 12 volts to it, you should hear a "click" drop the pan and remove the filter, it will be the solenoid with the VIO/ORG wire going to it. Here are the transmission wiring diagrams as well so you can see how the system works. Check out the images (below). Let us know what you find.
Images (Click to make bigger)
Wednesday, June 12th, 2024 AT 11:36 AM