turn driveshaft to check gear ratio

[trailblazr81]

I have always heard of how you mark the tire and driveshaft, then see how many turns of the driveshaft it takes to turn the tire once. I tried this for I think the third time and it hasnt worked out to well. This time I spun the driveshaft and my 14 Bolt axle turned the tire once after only 2 turns of the driveshaft. I know my axle is not 2:1 gears. So what gives?? And I did the test where you turn one wheel forward and the other wheel went backwards so a locker or two is definately on the list.

 

[loafer]

I have always heard of how you mark the tire and driveshaft, then see how many turns of the driveshaft it takes to turn the tire once. I tried this for I think the third time and it hasnt worked out to well. This time I spun the driveshaft and my 14 Bolt axle turned the tire once after only 2 turns of the driveshaft. I know my axle is not 2:1 gears. So what gives?? And I did the test where you turn one wheel forward and the other wheel went backwards so a locker or two is definately on the list.

if you only had one tire off the ground then the differential gears are going cut your ring and pinion ratio in half; So if it took two turns of the pinion yoke to make one revolution of the tire you probably have 4.10 gears, which is a common axle ratio for a 14 bolt.

 

[trailblazr81]

OK ya that sounds better. When I tried it with both tires off the ground one wheel would turn about halfway around then the other wheel would spin. Thanks