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Wishbone is necessary to provide the movement of the wheel centre in a plane. This part is perpendicular to the longitudinal axis and is located along the longitudinal axis. It is also worth noting that none of the vehicle suspension is complete without this component. As for the most common for today McPherson suspension, wishbone suspension in this form is attached through the silent-blocks to the cross bar. It is connected to the wheel knuckle through a ball joint. The body of the car in such a structure serves as the upper arm, as it is attached to the damper strut. This design is ideal for very small and small class, but not suitable for other car classes.

Suspension on double wishbones with two elements that have a swing mount bearing on the frame, crossbar or body. This design provides connection of the outer ends by the use of ball joints with a steering knuckle or stub axle. Therefore, the bigger distance between the wishbones is the less force that acts in levers and bearings is. Thus, the parts are less subject to the force and hence the kinematics of the suspension is more precisely.

Multi-link suspension is used in front and rear suspensions. For optimal kinematics of the wheels, as well as for better stability and handling, there are used four or five levers. Two levers are needed to hold the wheel. Others provide necessary kinematics. In this case, it is not required to combine shock absorber and spring into the strut. It is also necessary to speak about all-wheel drive passenger cars, in which multi-link independent suspension is mainly used.

If you need to replace the wishbone, it is reasonable to do this in a car workshop. Still, it is much better to order the part you need in our online store. For instance, shock absorber, ignition coil or flange. Ordering online you will significantly save your time and money.

What is necessary to know about suspension arm replacement: lifetime limits, common defects and their signs, tips and recommendations

Operational lifetime of the suspension arms is 60,000 – 80,000 kilometers of car mileage. It greatly depends on road surface condition, where the car is used, and driving style. Apart from wear-out, defect of the front or rear suspension arms may be caused by various mechanical damages (cracks, breaks) and deformation.

Defect signs of the parts are screeching and knocking during driving on a rough road. When cornering, cracking and clicking may be heard from the suspension side. Moreover, signs of arms failure are: worsening of road-holding ability during straightforward movement. Defects of the arms (trailing arms or wishbones) may be indicated by uneven wear of tyres treads and significant free play of the steering wheel.

It is recommended to inspect the components at a service station. A lifting platform or a servicing pit are necessary for it. The parts are thoroughly inspected for presence of cracks or deformation and replaced if needed. It is better to entrust this procedure to specialists, as demounting of some other parts impeding access to the unit may be required.

Algorithm for replacement of the front and rear upper arms slightly differs from procedure of demounting and installation of the lower suspension arms. In any case, demounting of the wheels (front or rear) will be required, as well as cleaning of the suspension from dirt. Then, a specialist unscrews fasteners of the stabilizer link and demounts the ball joints. During removal of the rear lower arm, fasteners of the part to the stub axle and fastener of the part to the axle beam are unscrewed. Demounting the front lower arm (as well as the rear one), a specialist will disconnect the ABS sensor if necessary.

After this, a defective component may be dismounted. A new arm is installed in the order, reverse to the removal process. Having the part installed, a specialist will check wheels alignment and adjust if necessary.

During replacement of suspension arms, it is recommended to pay attention to condition of the ball joints, bushes, shock absorbers and stabilizers. By necessity, these parts should be replaced together with the arms.