| This is a picture of my own rear upper A-arm. The inner heimjoints is having the bolt vertically. It is also so that the treaded balljoint shaft is inline with the A-arm leg, making for a straight load A-arm leg-treaded shaft-spherical bearing. Even the outer, uppright bearing, is having its centre inline with both A-arm legs. That way we have eliminated all bending loads on both A-arm legs and heimjoint shaft.
However, in my case where the rear A-arm leg is possitioned 90 dgr to centerline of the car, the inner ball-joint could be mounted vertical or horizontal.
We must also take icoilover mounting in to concideration in the case of a lower A-arm.
Goran Malmberg
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Hemipanter |