Automobile Engineering in ME
The ball joints are used on the tie rod ends, because they

Reduce the amount of noise generated
Can deal with movement of the suspension both vertically and in other directions
Reduce the amount of sliding resistance
Improve the force transmission speed

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Automobile Engineering in ME
The order in which effort applied to the steering wheel is transferred to the front wheel is

Steering wheel, tie rod, steering gearbox, steering shaft, steering knuckle, front wheels
Steering wheel, steering gearbox, steering shaft, tie rod, steering knuckle, front wheels
Steering wheel, steering shaft, steering gearbox, tie rod, steering knuckle, front wheels
Steering wheel, steering shaft, steering gearbox, steering knuckle, tie rod, front wheels

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