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A simple MacPherson strut suspension on the left front wheel of a rear-wheel drive vehicle. The front of the vehicle is at bottom right of the image. Upper green: Vehicle body/strut interface Red: Steering knuckle or hub carrier Blue: Lower control arm or track control arm Light blue: Steering gear tie rod or track rod Lower purple: Radius rod
When the front hubs are locked, even if no power is sent to the front axle (by means of a transfer case), the turning of the wheels will still spin the front axle, differential, and driveshaft, which puts extra load on the engine. Unlocking the hubs disconnects the wheels from the axle, which eliminates this extra load.
Clunking sounds: Driver can hear the noises especially when turning the vehicle, accelerating or even putting it into reverse. Vibration: An early and common symptom of a failing drive shaft is an intense vibration coming from underneath the vehicle. Worn out couplings, u-joints, or bearings cause excessive drive shaft vibration.
A value of 50% would mean, that half of the weight transfer to the front wheels; during braking, it is being transmitted through front suspension linkage, and half is being transmitted through front suspension springs. For inboard brakes, the same procedure is followed, but using the wheel center instead of contact patch center.
Intersecting the axes of the front wheels on this line as well requires that the inside front wheel be turned, when steering, through a greater angle than the outside wheel. [2] Rather than the preceding "turntable" steering, where both front wheels turned around a common pivot, each wheel gained its own pivot, close to its own hub.
Transverse leaf spring front suspension is a type of automotive front suspension, whose usage is most well known in Ford Motor Company products from 1908 to 1948 (1959 for the inexpensive Ford Popular in the UK). "Suicide front axle" is a term that has been used for it.
Image credits: Burgur #2. Sort of backward, I suppose, but I was a stripper for a little while in college. One time I was asked to show up dressed as a pizza guy.
Front beam axle suspension is unusually sensitive to any lack of concentricity in the hub and wheel assembly which can cause a side-to-side oscillation ("shimmy") of the steering at certain speeds (typically 60–80 km/h; 40–50 mph), commonly referred to as "death wobble" within the 4×4 community. [3]