I have a GM 10 bolt rear end (non-posi) in my T-bucket. I tried determing the gear ratio by raising both rear wheels off the ground, marking one of the tires and counting how many times the drive shaft turned (marked also) while making one complete turn of the marked tire. The result was about 1 3/4 turns of the drive shaft per one complete turn of the tire. I tried the same thing with just the marked tire off the ground and got the same result. Also, when I turned the marked tire twice the drive shaft made a little more than 3 turns. I originally believed the gear ratio was 3.43:1. Without actually counting the teeth of the ring and pinion gears do the results of the above "turn test" confirm that or does it indicate something else? Thanks!