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First you need to think of some basic geometry:

The bigger the circle, the longer the circumference.

Thus, when you turn, the car is traveling two arcs or circles. The side on the outside of the circle, that is, the opposite side from the direction you are turning, has to travel farther. So if you drive a car in (part of) a circle, the outside wheels will have longer to travel than the inside wheels.

For a wheel that's spinning independently of the others, this doesn't matter, but for a powered wheel it does. If you have two wheels solidly connected to the same axle, they'd fight each other when turning, wearing the tires down, and trying to twist the axle.

A differential is a clever sort of gearbox which allows power to be split between the wheels, letting them turn at different speeds when cornering.

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Q: Why does the rear axle of trucks have a differential?
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Whats the rear differential 1999 Tahoe?

The rear differential is where the driveshaft meets the axle. Its right in the middle of the axle and is about the size of a basketball.


Where is the rear differential on a 1999 Chevy 1500?

Inside the rear axle.Inside the rear axle.


What is the purpose of inter axle differential?

The inter axle differential (also called a power divider) is an integral shaft in the forward axle. That shaft is the input for the forward axle and also the rear axle with a differential separating the input from the output allowing for a difference in speed between the front and rear axle.


What is the purpose of inter-axle differential?

The inter axle differential (also called a power divider) is an integral shaft in the forward axle. That shaft is the input for the forward axle and also the rear axle with a differential separating the input from the output allowing for a difference in speed between the front and rear axle.


How do you identify an automotive axle?

The axle the big round rod that runs between the tires. On rear axle the rear differential is located


Will a 1979 Chevy truck differential interchange with a 1986 Chevy truck differential?

If you are talking specifically about the differential, then the answer is yes, but only if the two trucks have the same model of axle, and you also switch the axle shafts. If you are talking about the entire front or rear axle, then this is also possible. All straight front axle 4 wheel drive Chevy truck front axles can be interchanged (some will need conversion u-joints in the front driveshaft to connect). Also, 73-87 (and 88-91 blazer and suburban) rear axles can also be interchanged, with a caveat: 1 ton trucks have different rear axle spring pad spacing, and the 1 ton rear axles will not fit 1/2 and 3/4 ton trucks without cutting, moving them, and re-welding.


Where is the Rear end differential on a dodge ram 1500?

Inside the rear axle.


What differential is in a 2004 dodge 2500?

Front axle is a 9.25 American Axle Rear axle is a 10.5 American Axle


What is a rear differential axle?

Vehicles with front wheel drive have a straight rear axle meaning there is no gear housing in the rear axle. Vehicles that are rear wheel drive have a gear box in the middle of the rear axle to change the rotation of a drive shaft to turn the rear axle. If you look under a full size pick up truck rear axle you will see a large gear box (typically referred to as a pumpkin) in the middle area of the axle. That is the gear box differential.


What does your 1986 blazer have for a Differential?

That is your rear axle. It delivers the power to your tires.


Which sensor controls the speedometer in a 1990 Chrysler New Yorker Fifth Avenue?

Not a Chrysler tech but the VSS (vehicle speed sensor) is normally a sensor at the transmission in front wheel drive cars located at the differential housing in order to count drive axle RPM. In rear wheel drive cars/trucks it would be found at the differential in the rear axle.


How are the outer axle bearings of a rear-wheel drive solid rear axle lubricated?

In many cases they are lubricated from the gear oil in the differential.