There should be a small clip on the trans lines at the rad. Move the plastic cover off of them if they are there and you will see them. They are 3 sided. Grab a pick and magnet so it doesn't go flying once you remove it. Then the lines just pop loose. And yes, you may loose some from the bottom one but not enough to matter. Just top up the trans when done. Bottom line is a PITA fyi.
And that line under the brake booster is likely where the orifice tube is IIRC. You'll want to replace that as well. Just make sure you note which direction you remove the old one so you install the new one the same way. And lube all the O-rings with PAG oil so they don't roll up/cut on install. And you will also have to install a new receiver/drier since the system will be opened. So, o-ring kit, condenser, receiver/drier/orifice tube, PAG oil and away you go.
And I got that line loose under the booster by using a big crescent wrench and another wrench to hold the other side of the line so it didn't twist the line. Was a pain but it worked.
