I had a problem that started yesterday, where when i stopped and put the car into park.. (automatic) it wouldnt click into park, it would roll.... now i heard this is probably just a loose cable or whatever...well i just got home, pull into my garage, threw the car in park... and it was still in DRIVE... is this just a loose cable, having the same thing to do with as not being able to put it in park?... and can someone gimmy pretty detailed instructions on how to fix it.. or does it need to go to a tranny shop? any help is appreciated.