About 6 months ago i was driving along the motorway and a dense griding/squelling noise started up and vibration that seems to be coming from front of car. The noise got worse when i took foot off accelerator (ie going down hill) and seemed to stop when I was either accelarating hard like going up hill, turning a corner or putting on brakes. The noise does not change at all when changing gear or when slowly pulling up handbrake.
Only ever started when going above say 50mph and when i'd slow down to about 30mph would stop. It also only started about half an hour in to a drive when car was warmed up.
It stopped doing it for a good few months and now noise and vibration is back again when driving at high speeds.
Has anyone got any ideas??
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You are suggesting it is not the engine and is in fact related to road speed. How come you did not investigate this fault 6 months ago as it may be a safety issue. Either you have a wheel bearing about to fail big time or a brake problem. This could be a brake pad seperated from the metal backing so get is all checked out before you drive the car much more. Regards Peter
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or the diff is going to fall out, as said,needs checking yesterday.
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\"a little man in a big world/\"
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Thanks for the advice. The first time around as it came and went i assumed it was a stuck stone so thought no more of it.
Since the recent noise I havent driven it cos as you said it could be unsafe.
Its been to one mechanic who said its a gear box problem. Though im not convinced as would have thought if it was to do with gears, the noise would change pitch as i change gears.
Didnt fancy forking out for a new gear box incase my instincts are right so im getting a second opinion first.
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It's not unknown for these gearboxes to throw their diffs, but it usually only occurs at high mileage - failure of this part would not change with gear, as it is connected to the wheels. I guess this would be given away by heavy contamination of the oil, so worth getting that dropped to see if there's a lot of metal filings in it. The O/S driveshaft is long, and there is a bearing mounted on the back of the engine. This can get noisy, leading to the sort of noise you are hearing. Might be worth popping the shaft out whilst the box is drained and seeing if there's any play / roughness in the bearing.
It could equally be a wheel bearing, althogh these usually show signs of more /less noise as you go around corners, depending on the loading.
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RichardW
Is it illogical? It must be Citroen....
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