Inside the tube next to the front differential there is a sleeve that is actuated over the gear locking the diff into 4x4. You can see a plastic cover over the motor used to engage the lock.
Under the rear of the car on the passenger side just in front of the differential.
repair manual fora front differential on a 2001 ford ranger edge
The switch itself is most likely bad
2.5 quarts
how i can removefront headrest for chevy suburban 2001
Dana 35
You can program a 2001 Chevrolet Camaro by locking then unlocking the door locks.
front
I have a 2001 Chevy silverado with the 5.3 and im almost positive i have 3.42 gears
i don't know if its the same for most trackers but my 1999 Chevy tacker which is a 2.0L takes 80w-90 GL-5 gear oil... and it takes 4.6 quarts too...hard to believe it!
Dana 216 FBI (Dana 44)
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.