Just how important is the overdrive solenoid in the grand scheme of your vehicle's overdrive? Let's just put it this way: without a working overdrive solenoid, you might as well just ditch the entire overdrive because it's nothing but dead weight. That's because the overdrive solenoid is what triggers your overdrive to actually kick in when your rig needs it. That's why it's critical to swap out a busted overdrive solenoid as soon as it shorts out. For big time savings on a new overdrive solenoid, steer on over to AutoAnything.