anyone know about 87 broncos?

My wife has a 95. We have owned it about 4 years. It's been a solid rig. Check the operation of the rear glass. If the rear glass won't go all the way down, you can't open the tailgate.

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The rear glass seems iffy
It looks like the buttons only work when pressed very hard, a little sideways

The mechanism is bone dry too, but I didn't have any grease handy when I last looked at it

Going down goes fine...up a little less