Originally Posted by Bigwheel
If the wheel makes one revolution and the drive-shaft makes 6 revolutions, the rear-end ratio is?
One wheel, or both wheels at the very same time, make one revolution?

If you turned both wheels once at the same time, and you got 6 driveshaft turns then your rear axle ratio is 6:1, probably 6.17:1 in reality, that's believable.

If you left one rear wheel on the ground, and turned the other one turn, got 6 driveshaft turns, then your rear axle ratio is 3:1, which is unlikely for that size truck.

A more accurate method is to turn the driveshaft 20 turns, let only one wheel turn(open differential/no locker), then 20/2=10 to account for the differential action of only one wheel turning.. Now 10 divided by number of wheel turns is your ratio.

It's confusing, If I didn't get my head wrapped around it right, please correct me.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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