Evan hit the nail on the head with his technique for checking out the R&P ratio. However, it's tough to differentiate between that "smidgen." Not much difference between a 3.08, 3.28 or a 3.38. I've found that if you turn the tire 10 times, and then multiple the number of turns of the pinion by 2, then divide by 10, you'll get the first TWO numbers of the R&P ratio. As an example 10 rotations of the tire produces 20-1/2 rotations of the pinion......multiply by 2 which equals 41 and divide by 10 gives you 4.1. That narrows the options appreciably.
Dave
Last edited by Fla54Chevy3100; 12/12/2009 1:12 AM.
