From what I can find, your transmission does have only one control solenoid. The others are called shift solenoids. See the attached image. The solenoid is in the valve body. Here are the instructions we have for that.
Www. Dropbox. Com/s/j3reirjskxt3b7x/Valve%20Body%20%26%20Solenoid. Pdf?Dl=0
Image (Click to make bigger)
Sunday, September 13th, 2015 AT 7:23 PM