See All 15 Photos Assuming a 1:1 transmission gear ratio and no slippage, the above chart shows the rpm you can expect at 60 mph with different combinations of gear ratios and tires. MOTORTREND ...

Robin Warner The chart shows gear number, gear ratio, total ratio (including final-drive ratio), top speed in each gear, engine rpm at 5 mph and engine rpm at 75 mph. Math was involved.

The chart below represents a 2021 Detroit DD15 engine ... It boasted an engine speed of 1,150 rpm at 65 mph using a D13 engine with 425 horsepower and 1,750 lb-ft of torque, an I-Shift overdrive ...

Manually shifting allowed him to modulate the wheelspin and shift around 5,700 rpm, a couple hundred rpm ... needed 5.3 seconds and 13.9 seconds to hit 60 mph and the quarter mile, respectively.