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I did mine with the window in, took off the inner panel, took the 2 screws out of the door weatherstrip ends , took the end screws out the outer seals and pop the old seals out. Reverse to install new seals.
Loosen or remove the two felt covered brackets (the official name escapes me) on top after removing the door panel. that will let the window move to the inside of the door enough to easily R&R the outer felts. Just put them back the way they came out or the window will either rattle or be very slow while operating.