what should the needle be on - on dashboard for the battery
There is just a rear one I believe, on top of differential
between the front wheels
Remove the fill plug from the 2001 Explorer differential. Remove the cover from the head to allow the fluid to drain. put the cover back on with a new gasket, then fill the unit up through the fill hole.
The front differential uses 80w90.
According to the owners manual - Motorcraft SAE 80 W - 90 Premium Rear Axle Lubricant in the front ( and rear ) differentials on a 2000 Ford Explorer
Is the fluid coming from the vent hose ? When the differential fluid gets warm , it expands , and sometimes can come out the vent tube ( especially if someone has " topped it up " when it is colder ) or is it leaking from a front axle seal ?
there is a drain (on the bottom) and fill plug (toward the top) for the front differential. 1.6 quarts of 75W90 GL-4 or GL5 gear oil.
The front differential is an "open" differential. No limited slip components there.
Replacing the front differential on a 1997 Ford Explorer may cost anywhere from $400 to $800 in parts alone. If one wishes to get brand new parts, the cost for replacements can be expected to double. Labor will likely cost between $800 to $1500, which brings the total range anywhere from $1200 to $3100.
Front Rear End? Does that make sense? Front differential? maybe? Low fluid, wheel bearing, choppy worn tires?
the answer to this is questions is get on the floor
If it is the rear sensor, it will be in the differential. If it is a front sensor, it will be located at each front wheel.