LSD failing noises?

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wildeian
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Tue Jan 13, 2009 12:03 am

What sort of noises do LSD's make when they are on their way out?

I've got a kinda cyclic-whiring noise coming from the back end, and I can't seem to get rid of it!! :x

I've changed the discs, calipers, h'brake shoes, bearings, backplates, prop and centre bearing.

Only really got Diff, G'box, H'brake cable to go!!! Or higher springs/shocks (40mm cabby springs & Koni adj's at the moment)

My faith is faltering!! :?
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leeparkes
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Tue Jan 13, 2009 12:09 am

when was the last time it had fresh oil?
Cypriotgeeza wrote:I done both my mates in my old 318is
felt so proud,even tried it with a E30 325i and got put in my place.. :o:
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wildeian
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Tue Jan 13, 2009 12:12 am

about 18 months ago when I transplanted it from my sport. Checked level/colour a few weeks ago and looks good
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m4xos
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Tue Jan 13, 2009 12:59 am

sorry to say but its defo your diff, change the oil asap, you might have a chance but probly would get worse as time goes on, the more s**t you give it, the quicker it will break, by the sound of it to me, its sounds to me like the very very begging of it breakin!!
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wildeian
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Tue Jan 13, 2009 9:19 pm

Doesn't seem to make the noises in reverse!?!? :? (straight line)

Although it does make another 'churning' noise when I reverse whilst turning.

I really don't want to put the standard diff back on, cos if it isn't that, I doubt I'll have the patience to put the LSD back on!! :(
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Dave_M3
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Tue Jan 13, 2009 9:36 pm

What oil are you using?

18months between oil-changes is a good bit in my oppinion... I'd try to change it every year.

It's probably just a bearing though, a diff shouldn't actually break unless it's being abused or poor maintenance.

If it's the bearings in the output shafts, it won't be too much of a problem.
The input bearing is a b!tch of a job alright though :(
M42 rightness above 6500rpm, nobody can hear you scream
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Theo
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Tue Jan 13, 2009 9:46 pm

18months between oil-changes is a good bit in my oppinion... I'd try to change it every year.
BMW say it will last a lifetime...
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wrcarter
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Wed Jan 14, 2009 8:31 am

though it does make another 'churning' noise when I reverse whilst turning.

Did you use LSD oil?
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wildeian
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Wed Jan 14, 2009 8:42 am

Used ATF in the Diff.

When I say 18 months, some of the time has been 'garage time'!!
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wrcarter
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Wed Jan 14, 2009 9:02 am

Used ATF in the Diff.
Should be LSD specific oil, like castrol B373. Change it for LSD oil and see what happens.
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