Shift solenoid malfunction?

I have seen the front fluid pressure pump fail which can cause multiple shift solenoid failures. I would check the fluid pressure of the transmission before replacing any more shift solenoids. Check out the images (below). Please let us know what happens.

It should be okay with that low of mileage but you never know, you can try a valve body which is the only service you can do without removing the transmission for a rebuild. Here is how to swap out the valve body.

Tighten in a crisscross pattern.

- Tighten to 10 Nm (89 lb-in).

Check out the images (below). Let us know how it goes.

Yes, a sticky valve can cause this issue and yes, the valve body needs to be programmed in here is how:

Solenoid Body Strategy Download

1. Using the scan tool, select module Programming and Programmable Parameters under the toolbox icon and select transmission. Follow the instructions displayed on the scan tool.

There are fields to enter the solenoid body 7-digit identification, and 13-digit strategy recorded from the solenoid body.

2. NOTICE: If the solenoid body information is not correct, transmission damage or drivability concerns can occur.

Enter the solenoid body identification and strategy.

The scan tool verifies the numbers entered are valid and displays a message if the information is not valid.

The scan tool will check to verify the file is present on the scan tool. If the file is present, the technician may proceed with downloading the file to the PCM. If the file is not present, the scan tool will need to be connected to the PTS (Professional Technician Society) server to download the file onto the scan tool.

3. Verify the file is present on the scan tool. If the file is present, go to Step 8. If the file is not present, continue with this procedure.

4. Connect the scan tool to the PTS (Professional Technician Society) server.

The screen will display a progress bar when connecting to the network.

5. Follow the instructions on the network to download the strategy file to the scan tool.

The screen will display a progress bar when downloading the strategy file to the scan tool and display a message if it is downloaded successfully.

6. If the scan tool cannot connect to the PTS (Professional Technician Society) server, download the file from www. Motorcraft. Com.

If the scan tool cannot download a strategy from the web site, a partial strategy will automatically be downloaded.

7. Reconnect the scan tool to the vehicle.

8. Follow the instructions displayed on the scan tool.

9. If a new solenoid body was installed, compare the 7-digit identification and the 13-digit strategy fields from the solenoid body to the replacement solenoid body tag provided with the solenoid body service kit and place it over the existing identification tag.

The scan tool will automatically download the strategy file or partial strategy file to the PCM and will display a progress bar while downloading. The scan tool will display a message when it is finished downloading the data that states that the file was downloaded successfully.

I can tell you they had internal issues with these transmissions, many people are saving olds cars just for this reason.

A shift solenoid in most automotive transmissions typically has a resistance range between 8 to 15 ohms.

It does not mention in the valve body installation instructions reprogramming so you should be okay. Make sure the valves are not sticking.

Yep, this would be a problem with the pressure regulating solenoid in the valve body or the pressure relief valve is stuck. Good job getting the pressures.

Yes, I would replace both. They don't say which solenoid is which, but I do have the transmission wiring diagrams so you can match the wiring to the solenoid. Check out the images (below). Let us know what you find.

I would put 12 volts to each solenoid to see if you hear a click letting you the solenoid is working. The Ohms look okay, so let's test the mechanical aspect of the part.

They are 12-volt solenoids so no worries there, also polarity does not matter. If something mechanical has broken inside the transmission it can cause all kinds for strange problems like this. If you are getting a code for shift solenoid B then I would test/replace it.