'87 Rear Sliding Window Replacement

[GTPETE]

Newbie here... Can anyone tell me how to replace the rear sliding window on an 87 Ranger 4x4 regular cab. All done finally rebuilding it except for this part...

 

[RangerX]

Just re-installing it? Hmm, I did mine five years ago...I remember reading to use a length of heavy string/thin rope wrapped around the window gasket, in the groove. But I'm not sure I did that. I think I just had someone hold it in place from the outside, while I worked from inside the cab, pulling the gasket in over the lip of the window opening. It's not unlike putting a bicycle tire on the rim.