How to calculate the RPM of a small gear?
How to calculate the RPM of a small gear? The general rule is - small to large gear means 'divide' the velocity ratio by the rpm of the first gear. Divide 75 teeth by 25 teeth to find the velocity ratio. divide the 60rpm by the velocity ration (3). The answer is 20rpm. What to do when reverse gear wont work? Make sure the shifter cable is in place and firmly connected. The loss of power in the other gears is also a sign that the transmission fluid needs to be serviced. Make sure the transmission is inspected as well...