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How do i figure out what my gear ratio is without having to remove the diff cover? Im trying to figure out what Im running so i can figure out a way to get better mpg and get away from 2500 rpm at 70mph. My truck has a 7.3 with a 5speed sittin on 265s.
on the diff over should be a little tag with a bunch of numbers on it. probly rusty, but it will say on the second line the first 3 numbers will be gear ratio