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Originally Posted by sandbagger
new lower balljoints(left was junk) and while I was at it new front rubber bushings since the arms were off, and everything had 120K miles on it since I last replaced it. Also found left front CV boot torn, and new CV as it was lifetime warr.
Still have a random front end vibration, normally at higher speed, 60+ but some times not till over 80, but then doesnt smooth out even under 60, but it comes and goes, not triggered by anything I can pinpoint. Wheels have been balanced and since its random probably not it.
Last spring was lower control arms and they are still tight.
Next thing is strut mounts and thinking the left front strut is dead?
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In my experience high speed vibration is usually wheel or tires. Have you checked for a bent wheel? Also sometimes tires will balance on the machine but still vibrate (imagine a tire that has a "hard spot"). Some shops have a special road force balancer that can help in these cases.
It can feel random. I think it's because of the two tires in the front of the vehicle interacting with each other. Imagine if both tires were out of balance in opposite directions - it would feel smoother than if they were out of balance in the same direction. Because no two tires are exacting the same diameter (and because no road is 100% straight) they will change interactions as you drive.