How do you know when a 700r4 is in park?

To determine if a 700R4 transmission is in park, check the gear selector position; the lever should be fully engaged in the "P" (Park) position. You can also turn the ignition key to the "On" position without starting the engine; the vehicle should not roll if it's truly in park. Additionally, you can try to manually shift the transmission lever; it should not move out of the "P" position unless the brake pedal is pressed. Lastly, when the ignition is turned to the "On" position, the engine should not start if properly in park.