Got a vibration, any ideas?
Discussion
Just had the car going over with a fine tooth comb as I've got a smallish vibration that's doing my head in! It only happens between 75-85mph and you feel it through the seat, not the steering wheel. I've ruled out suspension components and droplinks, wheel balance etc. the only thing I can see is a small amount of play in the slip spline on the prop shaft, could this be it? Should the be no play at all there or is it common for a small bit of play?
Rear wheel balancing would be my first suspicion. (Abd the cheapest and easiest to rule out).
Try to go somewhere that they are happy to let you watch the process, and make sure the balance it in full "dynamic" mode as opposed to slipping it into "static" (which is faster and easier for them).
Try to go somewhere that they are happy to let you watch the process, and make sure the balance it in full "dynamic" mode as opposed to slipping it into "static" (which is faster and easier for them).
Had the tire balance checked, 1 rear rim was 40gram out so sorted that, it has made a small difference, springs are new pedders anyway and tires are only 2 months old but will check them just in case. Anybody know about the prop shaft spline? Is a small amount of play normal or should there be no play at all? Thanks for the input so far guys!
Wheels
Are your wheels perfectly round and true
Just because they are balanced doesn't mean they are perfect
With all the road damage (pot holes and bad repairs etc) its easy to have a wheel that's out of true
Have you tried moving the wheels around on the car (front to rear) to see if the problem changes
Tyres
Has the car been standing or parked up for a long time - tyres can take on a flat spot from being parked too long in the same place
Brakes
Do you have AP's fitted - look for a slight distortion in the discs as well - you will see (when fitted properly) the fitted will keep moving the disc around the hub and measure the 'run-out'. They will position the disc where there is the least amount of run-out.
Tracking
Is your car set up properly - again (as above) just because it was correct - a pot hole or other road damage could put it out the first time you drive it
Are your wheels perfectly round and true
Just because they are balanced doesn't mean they are perfect
With all the road damage (pot holes and bad repairs etc) its easy to have a wheel that's out of true
Have you tried moving the wheels around on the car (front to rear) to see if the problem changes
Tyres
Has the car been standing or parked up for a long time - tyres can take on a flat spot from being parked too long in the same place
Brakes
Do you have AP's fitted - look for a slight distortion in the discs as well - you will see (when fitted properly) the fitted will keep moving the disc around the hub and measure the 'run-out'. They will position the disc where there is the least amount of run-out.
Tracking
Is your car set up properly - again (as above) just because it was correct - a pot hole or other road damage could put it out the first time you drive it
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