What is the rear half shaft - middle shaft of a car
The rear half shaft and intermediate shaft of a car are different components in the transmission system and have the following distinctions:
Rear half shaft
Located on the rear axle, it is responsible for transmitting the power from the differential to the left and right drive wheels. It adopts a solid structure to withstand torsion and impact forces during turning, braking and other working conditions.
Intermediate shaft
It belongs to the internal structure of the transmission and is usually a hollow shaft. Its main function is to connect the first shaft and the second shaft of the transmission. Through the gearshift lever, it controls the meshing of different gears to adjust the output speed, direction and torque.
The functional differences between the two are obvious: The rear half shaft directly drives the wheels and requires a high-strength solid design; The intermediate shaft is responsible for the power distribution inside the gearbox. It adopts a hollow structure to reduce weight and optimize transmission efficiency.
The functions of the rear half shaft and the intermediate shaft (drive shaft) of a car are as follows:
The function of the rear half shaft
The rear half shaft belongs to the drive shaft and is responsible for transmitting the power from the differential to the rear wheels to achieve the vehicle's driving function. Its inner end is connected to the half shaft gear of the differential through splines, and its outer end is fixed to the wheel housing through flange discs or splines, simultaneously undertaking torque transmission and steering connection. If the rear half shaft is damaged, it may cause abnormal noise, accelerated vibration or lateral swing and other problems.
The function of the intermediate shaft (drive shaft)
The intermediate shaft (or drive shaft) mainly connects the gearbox and the rear half shaft, enabling the transmission of power from the engine to the rear wheels. It is usually composed of a shaft tube, a telescopic sleeve and a universal joint, which is connected to the inner and outer ends of the rear half shaft through the universal joint to ensure the continuity and stability of power transmission. If the drive shaft malfunctions, it may cause power interruption or abnormal noise.
The two work in coordination to ensure that power is transmitted from the engine through the transmission and drive shaft to the rear-wheel drive system.
If the rear half shaft (middle shaft) of a car is damaged, it needs to be repaired in time. The main symptoms include:
Abnormal driving
Metallic friction or collision sounds occur while the vehicle is in motion, especially more pronounced when turning
The steering wheel still veered off course after being straightened
Lateral swing or jitter occurs during acceleration
Mechanical damage
Fracture at the spline of the half shaft or cracks in the disc may cause detachment
Mixed cracks or fractures occur at the half shaft part
The screw is prone to fracture under impact load
"Safety hazard"
Severe damage may cause the tire to fall off or the wheel hub to be out of round, resulting in dynamic balance imbalance
When driving at high speed, it may cause severe shaking or even vehicle loss of control
It is recommended to replace the original factory parts immediately and have them inspected and repaired at a professional auto repair shop to avoid greater losses caused by long-term driving while faulty.
The main symptoms of faults in the rear half shaft (middle shaft) of a car are as follows:
Common fault manifestations
Youdaoplaceholder0 Abnormal noise : Metal collision sounds occur when driving or reversing, and metal friction sounds may accompany when the steering wheel is fully turned.
Youdaoplaceholder0 shaking : The vehicle body or steering wheel shakes violently during acceleration, turning or high-speed driving, which may be accompanied by left and right swaying.
Youdaoplaceholder0 Oil leakage : The dust covers of the inner and outer ball cages are damaged, resulting in the leakage of lubricating oil.
Youdaoplaceholder0 deviation : Loss of control of direction during braking and automatic deviation during driving.
Youdaoplaceholder0 Tire wear : New tires show wavy or abnormal wear on one side.
Cause of malfunction
Youdaoplaceholder0 Material fatigue or impact : Long-term overloading or sudden acceleration causes the half bearing to be under excessive pressure.
Youdaoplaceholder0 Insufficient lubrication : Damage to the oil seal or insufficient lubricating oil accelerates wear.
Youdaoplaceholder0 Installation issue : Improper assembly leads to uneven force distribution.
Youdaoplaceholder0 aging problem : Vehicles over 6 years old are prone to wear of the ball cage.
It is recommended to promptly inspect the bending, cracks of the half shaft and the condition of the connection parts. If necessary, replace the damaged components and replenish the lubricating oil.
If you want to know more, keep reading the other articles on this site!
Please call us if you need such products.
Zhuo Meng Shanghai Auto Co., Ltd. is committed to selling MG&MAXUS auto parts welcome to buy.
