How do I calculate my gear ratio?

The gear ratio is calculated by dividing the output speed by the input speed (i= Ws/ We) or by dividing the number of teeth of the driving gear by the number of teeth of the driven gear (i= Ze/ Zs).

How do I know what size speedometer gear I need?

To determine your tires true diameter in relation to determining what speedometer gears you need, measure from the ground up to the center of the axle then multiply by two. The actual run out of the tire can be as much as 2 to 3 inches less than what the circumference of the tire measures.

What is the best gear ratio for 1/4 mile?

A 4.10 gear would be your best bet to get because it will push the weight out of the hole and it would be easier to adjust your MPH with tire size.

How do you calculate rear end gear ratio?

Count the number of teeth on the pinion gear and count the number of teeth on the ring gear. Divide the ring gear teeth number by the number of teeth on the pinion. The result is your gear ratio.

Are 3.73 or 4.10 gears better?

3.73 VS 4.10 Ratio

3.73 Ratio	4.10 Ratio
Not as fast off of the line	Quicker Off The Line
Lower Torque	Higher Torque
Better Gas Mileage	Decreased Gas Mileage
Higher Top Speed	Lower Top Speed

How do I calculate my speedometer?

To calculate, find the ratio of the new tire diameter to the old one, then multiply by a speed on the speedometer to estimate the actual speed of the vehicle. Thus, the actual speed of the vehicle will be the new tire diameter divided by the old diameter, times the speedometer reading.

How do you calculate final drive ratio?

The straightforward way to calculate the Final Drive Ratio is to divide the number of teeth on the ring gear by the number of teeth on the pinion gear. For example, if the ring gear has 30 teeth and the pinion has 10, take the number 30 and divide by 10 to get the ratio of 3:1.

What gear should you be in at 60 mph?

5th Gear and 6th Gear You’ll use 5th or 6th gear for highway cruising at speeds of 60 mph to 70 mph and are ideal gears for best fuel economy. You’ll usually change up from 4th gear into 5th or 6th gear at a speed of around 40 mph or so.

How fast can you go with 4.10 gears?

62 5th gear and 3.73 rear gears yields a theoretical 191mph, . 62 5th gear and 4.10 rear gears yields a theoretical 174mph. If your goal is to make your car as fast as possible (top end), that formula will probably help.

How do you calculate RPM from gearbox ratio?

Write down the ratio of the speed reducer; for example, 12:5. Calculate the reduction by dividing 12 by 5, which equals 2.4. The RPM of the assembly is the RPM motor divided by the reduction. In our example, it would be 5000 RPM/2.4 = 2083 RPM.

How engine rpm is calculated?

Engine RPM, or revolutions per minute, is defined as the number of times the crankshaft of your engine rotates within the span of one minute. Your vehicle’s RPM can be calculated at any speed as long as you give the tire size, axle ratio, and final transmission gear ratio.

Is there a gear ratio calculator on Tremec?

As an added bonus, the Gear Ratio Calculator doubles as a Vehicle Speed Calculator. The estimated speed you will be traveling based on the parameters you established and the transmission you selected. TREMEC ASPECT RATIO CALCULATOR: Find your tire height using this calculator.

How many teeth are in a TCI speedometer?

One fits gears from 34 – 39 teeth and the second one fits gears from 40 – 45 teeth. Two aluminum housings are available for driven gears with 34 or more teeth. One fits gears from 34 – 39 teeth and the second one fits gears from 40 – 45 teeth. The driven gear housings go in the case just forward of the tailhousing.