You are right. In a reply email from dave at triple edge performance mentioned that both shift solenoids and the tcc pwm solenoid all get their 12v ignition feed through that TCC fuse under the hood. Mine was blown. So I replaced, checked both sides of the fuse and got 12v. I drove a bit and rechecked and fuse was good. I cleared the ecu. By a scanner and as soon as I put it in reverse the cel lit back up. I rescanned immediately. And just the 1860 tcc. Pwm code popped back up. So I am believing that solenoid is bad and tripping the other 2 I am going to check some wiring with the meter tomorrow and if all is well ill be replacing every solenoid in the side cover. Any thoughts advice or suggestions?