ELearn has a requirement for setting the position of the lower wishbone relative to the chassis before you tighten the lower wishbone pivot bolts. I guess this is necessary because the lower rubber bushes rotate through torsion of the rubber itself, hence tightening the pivot bolts with the wishbone in the wrong position will over strain the rubber bushing when the car is sitting normally causing failure. There is no such similar procedure for the upper wishbone and in fact once you've tightened up the pivot bolt it moves freely around the inner metal bush, there's no indication the rubber bush and inner metal bush are, or should be, bonded together.
Incidentally, the upper wishbones I used (Shop4parts ones) had no easy way of getting grease in between the rubber bush and inner metal bush, it was all pressed together too tightly.
Last edited by Alexie; 27-11-10 at 15:13.