Compliance balance

Incredible phenomena happened when the backlash was eliminated by replacing a frontal stabilizer link with ball joint on the left side in XH200 OPEL B-Vectra, the steering stability in centric position while straight running was far improved. The fact experienced at that time revealed that the play of frontal sway bar is not only for anti-rolling effect but even in straight phase it affect physically and continuous careful checking on backlash in the linkage is indispensable to keep an original performance.
On the other hand, too loose fitting frontal stabilizer and it's bushes on both sides had been observed in SXE10 TOYOTA Altezza when front axles were disassembled for shock absorber replacement. I asked to myself that any backlash in the stabilizer linkage should be the same as that in link ball joint? Input force must be blocked in any part if any week portion might exist. In another word, sway bar doesn't play in the initial stage of the rolling action. Of course the compliance setting here is very important to establish the taste of drive feel, because of the influences on frequency of NVH that is propagated to the steering wheel, it is nothing but sensitive.
As an experimental attempt, I applied a small piece of rubber sheet between stabilizer bush and supporting surface to compensate looseness of the portion fulfilling its role as a leverage points. As a matter of fact, steering stability has remarkably improved during both straight running and cornering disappearing any vague feeling on steering reactions.
As a conclusion, even a small piece of rubber sheet can change the driving taste meaning that the looseness and the tightness of the stabilizer bush is one of the very important setting point of compliance for the factory designing engineer fitting with stabilizer, it would do affect on the physical property on the portion including the effect on transient property. The vest balanced compliance condition should be decided by the results of repeated experimental studies by the professionals in the developing company, it is not in the region where the amateur or any layman can intervene.

For VW 1302, prepared I new replacement part, gas door pull handle, I leave it as it is just cutting out loop portion because of actual convenience.