I've look online and on here and no one explained it so I figured it out on my own here are some pics to help if you need it later on...
I didn't take any of the air door parts off I left them in place to hold the bar encase it dropped though the door.
1st the top the 3 bolts on the top of the door take them out...
On the bottom take the rubber seal off the outside of the door to expose the bolts going though the frame..
There is a 1/2" nut and bolt take those out and slide the door out from the bottom while sliding the top bar out... I used tape to hold the shims in place till i got the door back into place..
You will nee at least 2 people to help do this..