First post sorry I looked for a thread didn’t find one. I just replaced the transmission with a know working trans, AT light keeps coming on and posting codes: P0757, P0732, P0734, B1342, B1318. I have replaced battery with a new one, I have checked ATF I have replaced ATF (with MV) I have replaced trans filter and solenoid B not one metal partial on magnet in pan. Figured solenoid B was the problem because when I took it out it was jammed up I’m lost on what to do now, this was a car my grandpa gave me it has already gone through two trans in it’s life I am starting to wonder if there is an electrical/ecm etc issue. 2007 Mazda 6 125k on motor and 137k on new trans