Twitching at speed

[Machin]

My car has developed a twitch... as if the suspension is "loose"... its most noticeable at motorway speeds (70mph+) when travelling in a straight line.... I'm guessing this could be due to a failed suspension bush and I've heard that the track control arm bushes are quite a common thing to break-up..... does this sound right?

Is there any way of testing which bush has gone without removing suspension from the car? E.g. Jacking the car up and pushing on the suspension... or is the movement too small to be noticeable in this way?

Thanks in advance!

[ericinboca]

My car has developed a twitch... as if the suspension is "loose"... its most noticeable at motorway speeds (70mph+) when travelling in a straight line.... I'm guessing this could be due to a failed suspension bush and I've heard that the track control arm bushes are quite a common thing to break-up..... does this sound right?

Is there any way of testing which bush has gone without removing suspension from the car? E.g. Jacking the car up and pushing on the suspension... or is the movement too small to be noticeable in this way?

Thanks in advance!

I'm not sure you would notice movement just by pushing, jiggling, extra.

I would take a look at them. Look at the lower control arms. There is bearing were the control arms are attached to the frame - that one will be hard to see - there is a bushing where the leading control arm connects (talking front here), and in the back, a bearing connecting the control arm to the frame, a bushing for the leading control arm, and then the toe rod (not sure what it is really called) also has a bearing where it connects to the frame.

So, in the front, find one bearing and one bushing. In the back, find two bearings and one bushing.

Try to get a look at the rubber. Is it cracked, dried out, chunks missing? If so, then you probably need new bushings or bearings.