What is the forumula for determining what RPM my engine will be running at 70MPH if I know my transmission and rear end gear ratio? If my 4L70E auto transmission 4th gear ratio is .070, and my rear end gear ratio is either 2.59, 3.08 or 3.54 what would the RPM of my engine be? Trying to determine what rear end ratio I want in this corvette.
Thanks DG
Thanks DG
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