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08 Vibration during acceleration

3K views 3 replies 2 participants last post by  1999 White C5 Coupe 
#1 ·
When accelerating sometimes the car starts vibrating and will continue vibrating until I let go of the gas. It will take a couple seconds to calm down then it goes back to normal. The vibration only occurs during hard acceleration but at random times. It occurs on both turning and strait lines, and on light/heavy loads. Cant recreate it or determine exactly what and when causes it. Any help would be great, thank you.
 
#4 ·
I suspect you have one or more CV joints bad in the front drive axle(s). Each drive axle has an inner and out CV joint. Look at the rubber bellows around the joint and see if there are any tears - which often will sling-out CV joint grease and be obvious. If there are no tears, I would place the vehicle on a lift and see if the CV joints have any movement when you grasp the axle half-shaft and "shake" the axle.

It is also possible you have a broken transmission mount and/or an upper "dog bone" engine mount which may have a deteriorated rubber bushing (easy to see as the bushing often tears or breaks away).
 
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