Quote:
Originally Posted by VCP
This is common when a control arm bushing has failed. You will get a resonating effect which causes vibration and turning the wheel slightly will load the loose/failed bushing and smooth the vibe out.
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You're absolutely right that a busted FCAB can do that since it would then only have two solid joints on the arm plus 1 join that wiggles around a ton inside the bushing hole. Oddly enough, when I had this exact problem on my E46 years ago, it was incredibly noticeable and the wildly vibrated upon hard braking. During straight line driving it was negated somehow. Also while going over small bumps and reflectors/driveway entrances etc, the suspension would make audible knocking noises.
This problem above though is isolated to the spacers.
What is happening above is that the left front and right front can phase in an out of being crooked in sync with each other. That's why on highway drives, with two misaligned spacers, you can feel little to none and 4 minutes later your watch is trying to vibrate itself off your wrist.