Quote:
Originally Posted by lakeroadster
No it doesn't. One revolution is one revolution, regardless of tire size.
Follow this procedure, it always works when done properly:
To check rear end ratio jack up one tire if you have an open diff, or both tires if you have a working posi or locking differential. With the tranny in neutral (block the front tires first) rotate the jacked up tire one full revolution for posis and lockers and 2 full revolutions for open diffs. Carefully count the number of full revolutions the driveshaft makes. This is your gear ratio. In other words, if the drive shaft turns 3 ¾ turns, you have a 3.73 gear ratio. Turning the tire for twice the number of full revolutions and dividing the drive shaft revolutions by two will give you a more accurate reading.
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Your right... the tip of the second hand on a clock will go around the same as middle of the second hand will go around the same ... Doh !