Where is solenoid 'B', located?

Question

I received code-# P0756, and it is described as solenoid 'B' malfunction, normally energized. The description of loss of gears 2-3 is exactly what was happening when I received this code. The engine check light went off, shortly after it was on 2-5 min. The problem is still there. I would like to find out the location, of said "Solenoid 'B'" and a schematic of the electrical, for that section? Or what ever you can do to show me around this area?

Thanks for your time on this.
Larry L