There is no solenoid. It's a mechanical detent. Column shift will have a spring that holds the shifter in the locked or away from the driver position. You have to pull towards you to unlock. And floor shift you have to push the side button in. Both are common for the springs breaking and allowing shifting without overriding the detent, but you would have a limp shifter or button. As far as using the brake , you never had too on these cars. And the lock out for the shifter when the key is out is also mechanical in the column. Even with the floor shift your column turns like if it had a shifter attached , and that's what keeps it from being pulled out of park without the keys.