Goodyear's website, and maybe some others too, lists revs/mile for their
tires, other's should be close. If you drive 60 mph, check your rpm, and
divide the rpm by the revs/mile the result should be the gear ratio.
Since the 5 sp'ds have a 1.00 ratio in 4th, do your check in 4th or you'll
have to take the overdrive ratio into account. Like Brent says for
non-locking autos there'll be some slippage.
Larry Elliott, 3.9, 4x4, 5 sp'd, 3.55's, LE
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