Shock bush solutions
Premature failure of the lower shock absorber bush on late model independently sprung vehicles has been an issue for some time. According to Terrain Tamer, the reason for this weakness stems from the original design of the vehicle that puts excessive demands on this small rubber part that holds the full load and rebound of the independent front end.
This issue is magnified when raising the vehicle that naturally increases the compression and rebound forces travelling through this bush. This is the reason a number of Australian suspension companies have led the international market in developing solutions that not only minimise the onset of bush wear, but also strengthen the vehicle as a whole.
There have been different approaches, using us extensive testing. Most attempts ha have concentrated on the bush itself, with multiple generations of design designs introduced that have made this lo lower bush more durable and flexible. These advancements have combined with a great deal of education from the suspension susp companies, insisting that proper care be taken when fitting such shock absorbers, ensuring t the geometry of the vehicle is not altered.
The most important step is that shock absorbers are tightened at resting height, and not in a droop position i.e. on a two-post hoist. Approaching the problem from a different perspective, Terrain Tamer has developed a new range of Smart Coil front springs. This design has been taken from the V8 Racing
industry, where they have been able to minimise the rebound load that is excessive with constant load changes found on a race track.
The secret of the Smart Coil lies in the spring’s unique ability to respond to driving conditions and actively engage the correct force required. This activity allows a more comfortable movement, greatly minimising shock load on the lower bush.
Designed in Australia, and built using Australian steel, the Smart Coil uses a wire that gradually tapers higher up the spring. In fact, the top coils are designed to touch during travel, gradually increasing the spring rate. Each coil is treated with a phosphate treatment to eliminate the risk of rust that would traditionally occur when coils touch.
Although this solution was the result of addressing lower bush fatigue, the most noticeable change the driver will experience is in the performance. Installed in the front suspension only, the Smart Coil will control body sway, ensure precise steering and give a more comfortable ride.
The problem of premature bush wear is not the first example of the Aftermarket solving issues formed by the vehicle’s OE design.
Whatever solution you choose, you can rest comfortably knowing that Australia’s leading aftermarket players are offering solutions that are also being utilised by automotive markets the world over.
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