Specific tech about the MM Road Race control arm series. Specific tech about the MM Extreme Duty control arm series. Specific tech about the MM Heavy Duty control arm series. UPDATE ON MY REPAIR:Buy lower control arm. That rotation (axle wind-up) leads to wheel hop. Perform the final tightening of the nuts and bolts under unladen conditions with the tires on level ground. These shocks damp out oscillation and reduce the axle rotation allowed by deflection of the rubber bushings. Stock length replacement Designed for 2.5. Instead of improving the control arms, Ford's attempted solution to stop wheel hop was to add the quad shocks (the two horizontal shocks mounted behind the rear axle). Camburg Ford Raptor 17-20 Performance Slapper Lower Control Arm Kit. In older vehicles, this ball joint is serviceable on its own, without the need to remove or replace the control arm. The top of the A is attached to the steering knuckle by way of a ball joint. Step 4: Loosening the stabilizer fixing screws if necessary. In most control arms, the two lower parts of the A are attached to the frame via control arm bushings, which are rubber pivot-points. The two wheels on that axle will not be in proper alignment. Step by step: Replacing a control arm Step 1 3: Lifting the vehicle, preparation. Many front-wheel drive vehicles only use a lower control. Bad lower control arms will cause steering alignment issues. Deflection of the steel arm contributes to wheel hop. Most vehicles use either one or two control arms per wheel, on both the front and rear suspension. That style of construction is very cheap for mass production, but it does not make for a rigid control arm. The Dirt King Fabrication 4Runner / FJ Cruiser performance lower control arms were developed to withstand off road abuse and not compromise the vehicles on. The stock arms are made of stamped steel. This is the primary cause of wheel hop, and leads to poor traction and poor handling. The axle is allowed to shift forwards, backwards, and sideways under the car. In stock form, the rubber bushings in the control arms allow excessive deflection that prevents the rear axle from maintaining its correct position under the chassis. What's wrong with the stock control arms? The control arms, and their bushings, must withstand those forces. The axle pushes on the rear lower control arms, moving the rest of the car forward. Rear lower control arms, along with the upper arms, control axle rotation.Īll of the forces that accelerate the car pass through the rear lower control arms: The tires rotate on the pavement, moving the axle forward. As performance enthusiasts, we have very different goals. One of Ford's main goals when they designed the rear suspension was to avoid complaints about NVH (Noise, Vibration, Harshness) from little old ladies. Why change from the stock Mustang rear lower control arms?īecause the stock lower control arms were designed for a grocery-getter, not a performance car.
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