When all else fail:
Jack up one rear wheel, put the tranny in neutral. With masking tape or chalk, mark the tire, and the driveshaft. Rotate the tire 20 times while counting the number of rotations the driveshaft makes. Divide the driveshaft rotations by 10 and you've gor your gear. (driveshaft turns 41 times, they're 4:11's)
If it's a posi (the one wheel that's jacked up won't turn)jack up both rear wheels, do the drill again only rotate 10 times and divide by 10.
Works every time!!
