The driveshaft knows by many different names, such as propeller shaft, prop shaft, or driveline, and is a component of the drive train.
A drive shaft is a component for transmitting mechanical power and torque and rotation, usually used to connect other components of a drivetrain that cannot be connected directly because of distance or the need to allow for relative movement between them.
As torque carriers, drive shafts are subject to torsion and shear stress, equivalent to the difference between the input torque and the load. They must therefore be strong enough to bear the stress while avoiding too much additional weight as that would in turn increase their inertia.
To allow for variations in the alignment and distance between the driving and driven components, drive shafts frequently incorporate one or more universal joints, jaw couplings, or rag joints, and sometimes a splined joint or prismatic joint.
Driveshafts are one method of transferring power from an engine and PTO to vehicle-mounted accessory equipment, such as an air compressor. Driveshafts are used when there isn’t enough space beside the engine for the additional accessory; the shaft bridges the gap between the engine PTO and the accessory, allowing the accessory to be mounted elsewhere on the vehicle
The drive shaft (also called propeller shaft or prop shaft) is a component of the drive train in a vehicle, with the purpose of delivering torque from the transmission to the differential, which then transmits this torque to the wheels in order to move the vehicle.
The driveshaft is a spinning tube that transmits power from the engine to the back of the vehicle at the differential. It does this by transmitting the spinning power from front to back. The deliverance of torque from the transmission to differential then transmits torque to the wheels so the vehicle can move.
Without the torque transfer between the separate components, you cannot drive. The driveshaft absorbs movements and allows two separate parts to move without breaking drive train components in the process.
It’s important to note that front-wheel drive vehicles don’t have drive shafts. The transmission and axle are combined into a single unit called a transaxle. However, in four-wheel and rear-wheel drive vehicles, the transmission and axle are separate units. Hence the driveshaft transfers the turning motion of the transmission to the axle.
This component has a tubular design and is usually made from aluminum, steel, or carbon fiber to ensure its both strong and lightweight.
The type of vehicle you drive dictates what kind of drivetrain system is in your vehicle. There are different systems for rear-wheel drive, four-wheel drive, and front-wheel drive vehicles.
In a rear-wheel-drive vehicle, the rear wheels deliver the power. A long driveshaft is connected to the transmission on one end and the differential on the other end by universal joints.
On a typical four-wheel drive or all-wheel drive vehicle, there are two driveshafts. There is the same driveshaft that is on a rear-wheel-drive car but there is also an additional front driveshaft that is connected to the front differential and the transfer case by u-joints.
On a front-wheel-drive vehicle, the front wheels provide power. Instead of having a long driveshaft like on a rear-wheel vehicle, all the drivetrain components are in the front of the vehicle. Rather than using universal joints, this setup uses constant velocity (CV) joints.
If you are experiencing any of the following symptoms, there may be a problem with your driveshaft or your drive shaft’s U joint connection:
It’s important to note that the driveshaft by itself rarely fails. However, due to excessive stress and corrosion, it will eventually exhibit signs of failure.
Vibrations and shuddering are the most common sign of a failing driveshaft. If the bushings or U-joint wear out you can experience excessive driveshaft vibration. This may also result from the driveshaft not being bolted down properly or the unit being out of balance. A driveshaft that’s vibrating excessively can also cause the wearing of other drivetrain components.
Unusual noises are another indicator of a worn drive shaft. If the bearings and bushings that support the driveshaft and U-joints fail or get worn they affect the driveshaft’s ability to rotate normally. When this happens, you will experience scraping, squeaking, clanking, and rattling sounds.
Are you experiencing a significant amount of shuddering as you accelerate from a low speed or a stop position? This is another key sign of failing driveshaft components. A worn center bearing or loose U-joint may cause this. You may also experience some strange sounds like your vehicle shudders.
If you are experiencing problems when taking turns, there is a high likelihood that your driveshaft is worn. A damaged driveshaft prevents wheels from turning properly hence limiting your control of the vehicle.
To ensure that your driveshaft is always in good working condition you should keep it well lubricated. Lack of lubrication can cause damage to the driveshaft and its components. High-use driveshafts should be inspected regularly since they can wear prematurely due to excessive movement.
If you’re just replacing a half-shaft for your front-wheel-drive car, then it will cost anywhere from $470 to $940. You can expect the cost of the parts to be anywhere from $320 to $750, while the labor costs are only around $150 to $190.
If you have a rear-wheel or four-wheel drive vehicle which has a long driveshaft to power the rear wheels, then expect to pay somewhere in the range of $600 to $2,000. Keep that in mind that the type of vehicle plays a major role in both the price of parts and labor.
