Park in a nice flat empty parking lot.
Tie a piece of string , about 40 feet long to the brake line where it enters a rear wheel cylinder.
Run the string around the front of the tire outside, midway up and walk straight back from the truck.
Have a friend direct you side to side until the string just touches the sidewall on the rear or the tire.
Sight down the string from the end you're holding.
You should be able to see evenly down the side of the truck.
Do the same on the other side.
If you can see one side of the truck but not the other, the axle is crooked.
Archimedes screwed us !
I knew a blonde dyslexic agnostic insomniac - she'd lay awake at night, wondering if there really was a Dog.
2003 Ranger Edge 3.0 manual 2WD