# How does gear ratio affect RPM?

## How does gear ratio affect RPM?

Higher gears multiply torque less, but they require less input speed to deliver the same output speed; that’s why axle ratios also determine engine cruise rpm. Lower 4.10:1 gears would make the engine turn 4.10 times for each turn of the tire, so lower gears cause higher engine rpm at any road speed.

## 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.

What gear ratio increases speed?

A lower (taller) gear ratio provides a higher top speed, and a higher (shorter) gear ratio provides faster acceleration. . Besides the gears in the transmission, there is also a gear in the rear differential. This is known as the final drive, differential gear, Crown Wheel Pinion (CWP) or ring and pinion.

What is the gear ratio of a 4L60E?

The main hiccup on the 4L60E is its gear ratios – 3.06 in first and 1.62 in second, which meant you were getting a massive amount of torque in first gear, before dropping down to about half that power in second.

### How do gear ratios affect torque and speed?

The gear ratio expresses the ratio of the output torque to the input torque. Thus, we can multiply the torque supplied at the motor shaft (the input) by the gear ratio to find the torque at the wheel axle (the output). Transmitting power through a series of gears can also affect rotational speed.

### How do you know what gear ratio you have?

To calculate the gear ratio: Divide the number of driven gear teeth by the number of drive gear teeth. In our example, it’s 28/21 or 4 : 3. This gear ratio shows that the smaller driver gear must turn 1,3 times to get the larger driven gear to make one complete turn.

How do you find the gearbox 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).

What combination of gears determines the gear ratio?

## How do I find out what gear ratio My truck has?

To calculate your gear ratio you will need to remove the differential cover and count the number of teeth on the ring gear and the pinion gear. Divide the number of teeth on the ring gear by the number of teeth on the pinion in order to determine the gear ratio of a truck.

## What years are interchangeable for 4L60E?

What years does 4L60E transmission fit?

Year Ranges Transmission Pan/Filter
1994-1996 4L60E Shallow
1997 4L60E Shallow – Early Deep – Late
1998-2000 4L60E Deep
2001-2003 4L60E/4L65E Deep

Can you make a 4L60E a 6 speed?

It can be done, alot of the hod rod truck guys do it. Not a small undertaking. The six speed is a longer transmission so the crossmember has to be modified, drive shafts modified, TCM cabling it reworked, TCM reprogrammed, Need custom tuning done for it. If you google 4l60e to 6l80e you will find several write ups.

What happens if the gear ratio does not match?

The actual gear ratio is then compared to the desired gear ratio. If the desired gear and the actual gear do not match, then the PCM will set a diagnostic trouble code (DTC) and illuminate the Check Engine Light.

### Why is it important to know your transmission gear ratio?

Because different transmission gear ratios can greatly affect a drivetrain combination, it’s important for anyone performing a transmission swap to know the gear ratios of the gearboxes you might be installing in your vehicle.

### What happens if your transmission speed sensor fails?

Should either or both of these speed sensors fail, you may notice one or more of the following 3 issues: 1. Harsh or Improper Shifting Without a valid speed signal from these sensors, the PCM will not be able to correctly control the shifting of gears within the transmission.

What happens when you shift your transmission hard?

When the transmission shifts hard, it can damage internal components including valve bodies, hydraulic lines, and in some cases mechanical gears. If you notice your transmission is shifting harshly or roughly, you should contact a local ASE certified mechanic as soon as possible.