final drive ratios explained

It is the gear ratio of the last gearing typically between the output of the transmission and the wheels. What does changing it doCar Gears - httpsyoutubebgGgH0j0KQESubscribe for new videos every Wednesday.

Car Gear Ratios Explained Learn Driving Tips

Rear end gear ratios or final drive ratio refers to the number of revolutions the drive shaft turns compared to one full revolution of rear wheels.

. If you increase the final drive ratio each gear will have greater wheel torque while sacrificing top speed. The final drive has a ratio of 21. The total value that you have as a result is what would be considered as your final drive ratio.

Theres also a gear in the rear differential that puts the power to the ground. The final drive ratio is not goal gear ratio relating the engine rpms to wheel rpms. Hence the manufacturers term it as the final drive ratio.

And by fitting a shorter final. Final drive ratios explained Sunday April 3 2022 Edit. Using the 68 firebird and 3 speed as an example i graphically explain the effects of different final drive ratios on your 14 mile time and highway rpm.

A ratio of 3151 will give you a good mix of better mileage and decent power. A differential bends the rotation of the engine 90 degrees to drive the rear wheels. Select a mph speed multiply that by the overall gear ratio which is the gear ratio of the rear drive and the transmission gear ratio.

The most common place to find conical gears like this is in the differential of a rear-wheel-drive car. The final drive ratio is typically the gear ratio for the differential or the final location where the gearing is altered before being sent to the wheels. The final-drive ratio is the extent to which the rotating speed of the driveshaft output from the gearbox finally reduces before it reaches the driven wheels.

Gear ratios are what allow a car to reach a high rate of speed or climb a steep hill. The 373 final drive ratio is part of a heavy-duty towing package and comes with changes to tires and other elements. Moving from the 342 to the 308 final drive ratio the fuel economy in mixed driving can improve mpg by up to 10 mpg in typical highway driving but wont change much in city driving.

See Final Drive Ratios - Explained. What is a final drive ratio. If you alter this ratio it also changes every gears effective ratio affecting the vehicles performance and economy.

If you are trying to get the best fuel economy possible for your truck a lower ratio is a great way to do it. In fact the Ford F-150 which is considered the best-selling truck of all time offers trucks with a 3151 ratio at the lowest end of the spectrum. Learn about gear ratios see examples of how gear ratios function.

This is known as the final drive. A low ratio is a 373 and a high ratio is a 273 I know it seems contrary to what sounds correct but thats how it is. Its the combination of trans gearing and FDR that effects acceleration not the FDR alone.

Answer 1 of 2. The final drive ratio is typically the gear ratio for the differential or the final location where the gearing is altered before being sent to the wheels. When you multiply the two ratios it equals the final drive ratio.

Most overdrive trannies have a similar or low first gear and then of course have the final drive gear ratio that is less than 11. Even though the Vette may only be a 273 the gearing in the transmission compensates for that. Changing the final drive ratio heavily impacts the way the car behaves.

Final Drive How Does It Affect Vehicle Performance Carbiketech

Engineering Explained Final Drive Ratios Explained Facebook By Engineering Explained The Final Drive Ratio Is Typically The Gear Ratio For The Differential Or The Final Location Where