DonDP
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Everything posted by DonDP
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Thanks Jim, it does seem that the female spline is moving over the tailshaft but it moves more when the propshaft is in a certain orientation - is this normal? I greased them this morning but not sure when they were last done, only had the car since January!
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I had ruled out the wheels/tyres. I had a spare set of tyres that I had mounted and balanced and swapped front to back in separate tests and the results were the same. However, did not realise there could be an issue with the Apollo wheels also. How could I check that? I made a video of the potential play in the propshaft, do you think this is ok?
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Good evening all, Some of you may have seen my previous topic regarding high speed vibration at 100mph+ I am still hunting down the culprit and as mentioned I wonder if it may be propshaft related. Would anyone be able to comment if the movement in the prop shaft I have captured in the video link below is normal. Its a S3 Metric car, Mazda box, BMW diff.
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Back to the top with this one... whilst the old tyres were not quite round the vibration does not seem to be related to them. New tyres are on and its still there. I had excessive play in the radius arm bushes which I have replaced but were not the culprit either. I think the vibration is worse when things are warmer/hot. Would this be indicative of wheel bearings? There is no play in the rear wheels or any rough feeling when turning by hand. Thoughts?
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Good news, it would appear that the vibration is related to the tyres The wheel balance was way off and one of the tyres is certainly not quite round! Fortunately I have a new set ready to be fitted next week. Hopefully the next track day will be vibration free! Thanks for all the advice and comments.
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I am in Buckinghamshire, near to Leighton Buzzard...
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Quick update, bushes all seem ok, bolts are still all tight, A frame and DD are all in great condition. Have dropped of the rear wheels to be checked tomorrow. Looking at the tread wear pattern it does seem that one may have a slight flat spot. Although without prompting the mechanic did ask if the prop shaft was ok when describing symptoms... on FB someone commented that they had similar symptoms and it was also the prop shaft... its a 2014 car with the Mazda box, BMW/titan LSD and has the grease nipples on the prop. Will report back once I get the wheels back tomorrow
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Ok thanks, List of things to check will be; wheel balance, diff bolts, wheel bearings and prop shaft balance. Any other likely culprits?
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It was a private purchase. I don’t mind having to put things right as it is the right spec car I wanted at a reasonable price. Will check the wheels are properly balanced first. Wouldn’t bearings grumble if they are on the way out? There is no play I can feel in either rear wheel.
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Hi All First track day after I bought the car in January. Great day, although I am getting a vibration from the rear at high speed. It starts at about 100mph and at its worst at 110mph. It is not related to engine speed so assume it can only be something after the gearbox. I am going to check the rear wheels are balanced correctly but what else should I check? Wondering if it may be prop shaft related, any way to check without removing it?