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It is one of the things which does, yes. The higher your rear end ratio, the quicker you can take off, but the higher the RPMs you'll turn at speed, and this can limit your top speed. So, if you have, say, 3.55 rear ends, your tires will make one full rotation for every 3.55 turns of the driveshaft. The higher that number, the higher the number of turns.

Other factors to take into consideration are transmission final drive ratio. Most cars since the late 1980s have overdrive transmissions, meaning that the transmission output shaft turns faster than the input shaft when the vehicle is in Top Gear. There's a ratio to go with that, as well. For example, the 4L60E transmission used in a number of GM cars, SUVs, and light duty pickups has a .69 overdrive ratio, meaning that, when you're in that top gear, the output shaft makes a full rotation for every .69 rotations the input shaft makes. Overdrive can have you turning less RPMs at higher speeds, but it also puts a parasitic drain on the engine.

Then, you factor in tire size, and the corresponding number of revolutions they make with each mile. The larger the tire size, the less revolutions per mile, and the less RPMs you turn at speed.

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Q: Is differential affects car speed
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Related questions

What differential you have?

I have car speed is more


What is a driveshaft?

The driveshaft in a car brings the power from the engine and the speed through the transmission back to the differential on a car.


What affects car speed?

Fiction: between the tires and the road. the car with the air in the drivetrain


Can a bad rear differential hinder the speed of the car?

Yes and no. It will increase the resistance to the drivetrain and reduce maximum attainable speed. However if only the limited slip differential is bad then there is no real affect.


How does time affect speed?

Time affects speed because if the time is frozen no one can run or a car does not have speed


Where is the Speed Sensor on a 93 Saturn sl2?

Vehicle speed sensor is located on top of the differential on the transmission. Access is from under the car


What form the differential in the car?

The differential is part of the drive chain of the car.


What affects the speed of a rolling car?

Friction, gravity, wind resistence(form of friction)


Does a car's motor affect the speed of a car?

First off, it is not a motor, it is an engine. Of course the engine effects speed. It takes horsepower and torque to move a vehicle. The power of the engine determines how fast the car will go. The gear ratio of the transmission and the differential also determine the speed.


How do you change the top out speed in your car?

You can change the differential gear ratio but you will sacrifice quickness on the lower end unless you have sufficient horsepower.


Will your car increase the top speed if you modify your gear or add a bigger gear without changing the engine?

Yes, if you change the gears in the differential that drive the axles and wheels. The lower the gear ratio, the faster the car will go with the same engine RPM. Example: A car with a 3.55 to 1 ratio differential will go faster than one with a 4.1 to 1 ratio differential at the same engine RPM.


What is the difference between differential lock and interaxle differential lock?

Differential lock is a driver controlled locking mechanism which locks the speed differentiation of axle halfshafts in differential mechanisms.After locking, both wheels rotate in same speed.But the interaxle differential(IAD) lockstopsthe speed differentiation of two axles in Tandem axle vehicles by locking the inter axle differential(third differential),after locking IAD both pinions rotate in same speed.