No.
A 1998 Jeep Grand Cherokee has a four speed automatic transmission.
Will bolt up, but will not shift. The 1998 is controlled differently by the computer.
The only differences are between a regular Cherokee and a Grand Cherokee.
Me friend has a 1995 (same model as yours) jeep grand Cherokee with a 4in lift and it seems to be fine. I have a 1998 grand Cherokee and am thinking about putting some spacers in it.
Yes!
yes
NoNo
A Cherokee would have the AW4. A Grand Cherokee would have a 44RE.
It is not adjustable.
"how do you change a throttle position sensor on a 1998 jeep grand Cherokee?" could someone without any experience do it?
Check the belt tension. it is too hard on the bearing or it's running dry.
Since running boards were an option that replaces the rocker moulding I would say YES