I too, have a 92 SC400 and am currently repairing my window regulator.
No, you do not need a special tool to remove the fasteners that hold
the window glass. Use a 14mm open end wrench. The part you cannot see
(the bolt head) is square not hex. I used one hand to hold the wrench
on the bolt and the other to turn the wrench. After removing the
bracket attatched to the glass, I placed duct tape on the outside of
the window and taped the window in its full 'up' position and secured
the tape to the door frame. Anyway, I will give complete instructions,
if you would like. Also, you may find forums that discuss a "cheap
repair" for the broken plastic housing (that always breaks)using
epoxy. I tried that repair and had very short term success. There is a
web site offering repair of the regulator for $55,
http://www.onetobuy.bizland.com/id20.htm but I was not sure what to
expect from a "rebuild" so I bought a new one from the dealer for
$145.00, ouch.

2002 Ford Explorer has about 45,000 miles on it and will not shift. It has
a sealed trans with no dip stick would changing the fluid help?