Quote:
Originally Posted by Fartman22
What kind of gears are in my 61 1000 series pickup would you know???
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The most common gear is 3.07, but if you don't see a tag on one of the bolts you can count the ratio directly and be certain.
Crawl under the truck and put matching marks on the pinion yoke and differential housing. Jack ONE rear wheel off the ground, chock the opposite front wheel, put the transmission in neutral and the parking brake off. Can you turn the wheel easily? If yes, you have an open rear. If the wheel is difficult or impossible to turn, you have posi. In that case, jack BOTH rear wheels off the ground.
If you have an OPEN rear, turn the wheel exactly TWO revolutions and count (or have a helper count) the number of complete driveshaft revoutions and estimate any fractional revolution as closely as possible. The number of driveshaft revolutions plus the fraction is your axle ratio
If you have POSI, turn either one of the wheels exactly ONE revolution and count the driveshaft revolutions the same as for open.
Ray