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Author: Subject: Diff hiss
Lightning

posted on 6/8/04 at 08:53 PM Reply With Quote
Diff hiss

Have driven 200 miles in the last few days now the car is legal.
The diff Hisses quite loudly and the appears to be quite a back lash as it clonks as the drive is taken up. Presumably this is worn.

Where is the best place to get it reconditioned or does anyone have a good sierra 7 1/4" diff. I'm in the Southwest





Steve

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Jon Ison

posted on 6/8/04 at 09:04 PM Reply With Quote
by the looks of the pic yr running a bike engine, if so a fair bit of clonking will be coming from there too, tends to be less with more speed, the "hiss" is another story..........






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Lightning

posted on 6/8/04 at 09:14 PM Reply With Quote
Yep fireblade. Nice to know the clonking is expected but the hiss is very loud, baring in mind that I have no screen and hence I can hear it loudly over all the wind buffeting.

[Edited on 6/8/04 by Lightning]





Steve

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Hellfire

posted on 6/8/04 at 09:49 PM Reply With Quote
Lightning - you sure it's from the diff?

My next question is - did you shot/bead blast any of your components? You know where I am now going with this! We had some grit left over in one of the calipers... it soon went!






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Lightning

posted on 6/8/04 at 09:56 PM Reply With Quote
Not completely sure. I did first wonder whether it was a wheel bearing





Steve

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theconrodkid

posted on 7/8/04 at 12:20 AM Reply With Quote
remember you have little in the way of sound proofing/panels/boot junk etc between you and the diff,it will be noisier than a std road car





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pass the pork pies

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madforfishing

posted on 7/8/04 at 12:49 AM Reply With Quote
Earplugs ! Sorted !

YOU'LL HAVE TO SHOUT, HE CAN'T HEAR FOR HIS DIFF.






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Mark Allanson

posted on 7/8/04 at 05:56 PM Reply With Quote
quote:
Originally posted by theconrodkid
remember you have little in the way of sound proofing/panels/boot junk etc between you and the diff,it will be noisier than a std road car


Also the diff is 4 feet nearer than a sierra, and not rubber mounted, not on a subframe......





If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation

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Lightning

posted on 7/8/04 at 09:04 PM Reply With Quote
Yeh, I thought that too.

Also it occured to me tonight that it could just be the pads on the discs. I will try tomorrow touching the brakes and see if it goes.
Its probably is fine just me being paranoid.

The road holding is f*****g good though.





Steve

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JB
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Building: Built: V8 Kitten, 2 litre Lada, Space frame Minor,

posted on 11/8/04 at 12:09 PM Reply With Quote
Diff Hiss

I have a diff in very good condition in my car and it hisses at speed (above 25mph).

It sounds like a brake binding but pulling on the hand brake does not change the noise. It also does in when free wheeling.

I put it down to a solid mounted diff behind an aluminium panel and I have never been able to hear what a diff sounds like before.

John

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