where is the shift sensor and the solenoid b sensor?

These solenoids are located on the side of the unit. I am attaching the info below on how to replace this.

However, if you are going to replace the solenoids, I would suggest replacing the fluid at the same time.

Here is a guide that will help with this:

https://www.2carpros.com/articles/how-to-check-and-add-transmission-fluid

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Please find the info below on this and let us know what questions you have.

Thanks