shift solenoid b electrical

P0756 is for the Shift solenoid B being shut off, as you already know I am sure. So, you need to see if the Transmission Computer is trying to signal this solenoid or if the wiring to the solenoid is bad and not letting power get to the solenoid or the ground from the computer. here is a link to an online repair manual site that will have the info that you need: http://bit.ly/mitchell_repair_manuals_online