I just did both doors as well as installing vent windows.
You are replacing existing, right? I was starting with empty door.
I'd think you would first crank up the window. Remove/replace the two lower front and rear tracks. Then remove the window bump stop for replacement later. It is in the way.
With lower tracks in and bottom bumper removed, crank window all the way down. It will go lower than usual with bumper out. Remove the top and back track which is one piece. Remove vent track and with glass low the two felt pieces will pop out. I put these back last.
Put in the vent track, then top/back track. I had to snip some off end of top near vent for good fit. Last orient the felt pieces correctly (they fit just one way) and pop them in. Make sure you don't need to snip any before popping them in. Crank up window and install bottom bump. I think this should be the steps. I think the first door took me an hour. Door two thirty minutes.
