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Old 13 Jun 2007, 07:02 PM   #1 (permalink)
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? diff noise

I have a wheel bearing noise from the rear i recon diff?
but i will try changing the wheels around as i have read.
What happens when a diff goes?
Me and the wife are off to porlock nr minehead on friday night.
I,m a bit worried about it now.
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Old 14 Jun 2007, 08:58 AM   #2 (permalink)
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If you are concerned mate then I would suggest dropping the current oil thats inside. If your Diff is on its way out you generally see a lot of swarf on the magnetic sump plug and or look for a silvery colour to the oil. Obviouly make sure you have some replacement oil to go back in.

Certain tyres can make similar noises to what you have detailed and wheel bearings can to.
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Old 14 Jun 2007, 09:12 AM   #3 (permalink)
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Quote:
Originally Posted by Nelson View Post
If you are concerned mate then I would suggest dropping the current oil thats inside. If your Diff is on its way out you generally see a lot of swarf on the magnetic sump plug and or look for a silvery colour to the oil. Obviouly make sure you have some replacement oil to go back in.

Certain tyres can make similar noises to what you have detailed and wheel bearings can to.
Can certain tyres cause a noise when driving, i.e., when driving on different raod surfaces?

Scotty.
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Old 14 Jun 2007, 10:37 AM   #4 (permalink)
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Definitely mate - I have had 2 sets on my Evo (albeit a heavier car) that have made some very worrying noises at certain speeds. Having changed the wheels/tyres the noise went. IIRC a set of RE050 potenzas that I had on the car made a high pitched whirring noise when driving from 75-80mph. This only happened when they were about a third left of tread.

You'd be amazed that such noises can exist from tyres alone.
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Old 14 Jun 2007, 10:40 AM   #5 (permalink)
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Quote:
Originally Posted by Nelson View Post
Definitely mate - I have had 2 sets on my Evo (albeit a heavier car) that have made some very worrying noises at certain speeds. Having changed the wheels/tyres the noise went. IIRC a set of RE050 potenzas that I had on the car made a high pitched whirring noise when driving from 75-80mph. This only happened when they were about a third left of tread.

You'd be amazed that such noises can exist from tyres alone.
Cheers mate. The noises do sound worrying, but the pitch does change when on different road surfaces.

Scotty.
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Old 14 Jun 2007, 10:45 AM   #6 (permalink)
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One way to find out is to take the car out of gear and allow it to coast for a while......tyres will make the noise regardless of in or out of gear.

If you really are worried then swap your wheels with a mate and see if the noise persists.
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Old 14 Jun 2007, 04:47 PM   #7 (permalink)
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Going to drop the oil out tonight and have a look
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Old 14 Jun 2007, 07:43 PM   #8 (permalink)
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changed oil,was not realy any metal bits there.still no change,noise.
Looks like a new diff
Still going away so just hope its going to be ok.
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Old 15 Jun 2007, 08:26 AM   #9 (permalink)
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Do you have the same make of tyres fitted to all 4 wheels ? If so then i would stronlgy suggest swapping them with someone else who has a scoob just to eliminate tyre noise.

Its always worth doing the simple stuff before you write off Diff's etc.
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