Front Suspension Rebuil, Disassembly

The fourth generation Corvette was a radical departure from General Motors early Corvette engineering. It eliminated a perimeter frame to support the suspension and driveline. Two front frame rails integrated into the first ever Corvette uni-body construction. This made for an interesting driveline mounting installation. The front suspension subframe was bolted to the frame rails while providing engine mounting points. Anytime a spring wears out sooner than it should, the vehicle will display a few common side effects , including the vehicle leaning to one side or a rough ride. Once the 21mm nut is removed, the rubber spring cushion and washer should be removed. Once the front lower control arms are removed we'll move to the rear.

Support car frame by another jack, then slowly lower the jack under lower control arm. Hit the male end of the nut with a hammer to drive the bolt through the lower control arm bushing. Forks are also known as front suspension or front shocks. If your vehicle uses upper and lower control arms, you'll need a spring compressor.

I have placed the upper control arm in the press, capturing the arm end on the two metal plates and pressing on the shaft itself. When changing independent coil springs, the job is just as involved, and just as dangerous as changing coil springs on a strut. Buy new bolts and nuts that go on the lower rear shocks.

Remember that there will be a lot of spring pressure on ‘A' arms, so be very, very careful when you remove these bolts and nuts. This is how all of the bushings can be removed once the sleeve is out. They are not vulcanized to the control arm or camber rod ends.

The sprung mass is the mass of the vehicle supported on the springs, while the unsprung mass is loosely defined as the mass between the road and the suspension springs. Because dirt cars typically see a lot of dynamic shock travel, this can at times produce what we call side loading.

By far the front upper and lower control arms last the longest. Place the new coil spring into the lower control arm seat and frame bucket. Mercury Cougar Shock absorbers and struts absorb the impact on your suspension and help keep the tires firmly planted on the road.

NOTE: Apply a liberal amount of white lead or Lubriplate to both bushings before installing in arms. We found that PST actually offers complete stock-style replacement upper control arms with bushings and ball joints installed, and we decided to go new here.

Springs assist in exploiting power to the wheels, resulting is more speed, drivability (control) and consistency. On right end, remove radius rod pin nut and lockwasher, then disconnect pin support from bracket on axle housing. 15mm screws hold the toe link assembly onto the housing; these do not have to be removed for rear spindle knuckle work.

The forks and shock are then re-assembled with all new bushings and seals, correct oil levels, nitrogen pressures. Suspension Disassembly This type of spring provides the suspension required for heavier vehicles. Remove the remaining half of the front strut rod bushing. Insert the lower control arm bolt and tighten the nut on the back side.

Besides the usual wear items, the replacement parts from PST included the aforementioned upper control arms, the torsion bar adjusting bolts and swivels, upper control arm hardware, the sway bar and hardware, and torsion bars. 28 The fork cap is locked to the cartridge rod with a lock nut.

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