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Underneath the dash.
5W-20 , according to the Owner Guide
XLT means Extra Large Truck
Yes , 1997 was the first model year for the Ford Expedition
Starting with the 1995 model of Ford Explorer the automatic transmission was ELECTRONICALLY controlled , so there is no modulator valve
yes
Rear wheel drive or 4x4 capable
Rear wheel drive or 4x4 capable
iin the manual that came with your expedition
Yes , XLT and Eddie Bauer are just two of the Ford trim levels
A few hours.
On the Ford A4LD automatic transmission the modulator valve is on the passenger side of the transmission ( it might be behind a heat shield )