Originally Posted by 2bnb driver
Im trying to get an "out of the box" picture of what gearing translates to when the stock tires hit the road.
I have a base 2.7l tacoma with the standard tires and auto transmission. At 70mph im running at 2200 rpm.
I would like to know at 70mph, and in stock configuration, how many RPM's a base stick runs. Like wise a 4x4 2.7l base truck.
look up overdrive ratio and axle ratio, multiply them together to find overall ratio.
You can use the tire specifications on tirerack.com
, specifically "revolutions per mile".
rev_per_mile x mile_per_hour = rev_per_hour. Multiply that by 60 and you have wheel RPM. Multiply wheel RPM by overall gear ratio and you have engine RPM.