How are gear ratios calculated?
Dana 44 gear ratios may sound complicated, but all it takes to calculate them is some simple third-grade arithmetic. The formula is easy. A Dana 44 gear ratio is figured by taking the number of teeth on the ring gear and dividing by the number of teeth on the pinion gear. That’s it! Here’s that formula again for visual reference. RING GEAR TOOTH COUNT = DIFFERENTIAL RATIO PINION GEAR TOOTH COUNT So, let’s take this for example: a ring gear with 41 teeth and a pinion gear with 10 teeth. What is the gear ratio? 41 รท 10 = 4.10 — This would be referred to as a “four ten” ratio. The decimal point is seldom ever mentioned in “gear talk”. Therefore, if someone says that they have “four eight eight” or “four eighty-eight” gears, that means they have a 4.88 ratio ring and pinion. Now, it’s important to remember that ring and pinion ratios are rounded to the hundredths place (which is the second digit to the right of the decimal). So, let’s take this for example: a ring gear with 41 teeth and a
