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Front diff failure?
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Scwede
 


Member Since: 31 Jul 2014
Location: Jönköping, Sweden
Posts: 301

Scotland 2012 Discovery 4 3.0 SDV6 HSE Auto Sumatra BlackDiscovery 4
Front diff failure?

For the last two days I have heard a scraping noise like a stone in a caliper which increases with speed. It's quite pronounced when going slowly but didn't change when applying the brakes.

Today it suddenly got worse, much worse! and the car appeared to be slowing and vibrating, this was confirmed by putting into neutral. The noise did not disappear and the car slowed much faster than it should.

I jacked the car up and tried to rotate the right front wheel, which is where the noise appeared to be coming from. It took great effort to turn and would only go 1/4 turn accompanied by a grind and clunk.

I removed the wheel and have inspected the brake but can't find anything obvious. When turning the brake disc by hand (hard) there seems to be noise from nearer the differential.

Does it sound like the diff? Would this not mean the noise would go in neutral?

Many thanks
 2012 Discovery 4 HSE Sumatra Black
2008 Discovery 3 HSE, Java Black
2010 Discovery 4 HSE, Stornoway Grey
2005 Discovery 3 HSE, Buckingham Blue
1987 Defender 90, some sort of grey
1983 Series 3 SWB, Ex Coastguard, Trafalgar Blue 
 
Post #184755715th Aug 2017 5:21 pm
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20727

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

Sounds like the front diff has collapsed Shocked
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Post #184764215th Aug 2017 8:51 pm
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Scwede
 


Member Since: 31 Jul 2014
Location: Jönköping, Sweden
Posts: 301

Scotland 2012 Discovery 4 3.0 SDV6 HSE Auto Sumatra BlackDiscovery 4

Thanks Mikey - straight to the (expensive) point!

Here's a little video which may help confirm this - and I presume it should not be driven?

Cheers

https://www.dropbox.com/s/wqff1r51l7odbg5/IMG_2181%202.MOV?dl=0
 2012 Discovery 4 HSE Sumatra Black
2008 Discovery 3 HSE, Java Black
2010 Discovery 4 HSE, Stornoway Grey
2005 Discovery 3 HSE, Buckingham Blue
1987 Defender 90, some sort of grey
1983 Series 3 SWB, Ex Coastguard, Trafalgar Blue 
 
Post #184764915th Aug 2017 8:58 pm
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20727

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

I'd expect the pinion bearing to have collapsed. Take the gearbox undertray off, and give the propshaft a wiggle up and down. Should be fairly conclusive...
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Post #184765315th Aug 2017 9:02 pm
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Scwede
 


Member Since: 31 Jul 2014
Location: Jönköping, Sweden
Posts: 301

Scotland 2012 Discovery 4 3.0 SDV6 HSE Auto Sumatra BlackDiscovery 4

Will do..

Many thanks
 2012 Discovery 4 HSE Sumatra Black
2008 Discovery 3 HSE, Java Black
2010 Discovery 4 HSE, Stornoway Grey
2005 Discovery 3 HSE, Buckingham Blue
1987 Defender 90, some sort of grey
1983 Series 3 SWB, Ex Coastguard, Trafalgar Blue 
 
Post #184765515th Aug 2017 9:04 pm
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Scwede
 


Member Since: 31 Jul 2014
Location: Jönköping, Sweden
Posts: 301

Scotland 2012 Discovery 4 3.0 SDV6 HSE Auto Sumatra BlackDiscovery 4

An update on this.

It wasn't obvious if the noise was wheel side or diff side so I started with the easiest and discovered that the wheel bearing (right hand) had completely collapsed and seized (could be turned with driving force but not by hand). The old unit rattles and deposits metal shavings on the floor!

So one shiny new hub assembly and I did the discs and pads whilst in there and she is as good as new.

Interestingly I had none of the usual wheel bearing symptoms before it went.

Thanks for the input too Mikey.
 2012 Discovery 4 HSE Sumatra Black
2008 Discovery 3 HSE, Java Black
2010 Discovery 4 HSE, Stornoway Grey
2005 Discovery 3 HSE, Buckingham Blue
1987 Defender 90, some sort of grey
1983 Series 3 SWB, Ex Coastguard, Trafalgar Blue 
 
Post #185291531st Aug 2017 8:25 pm
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20727

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

TFFT! Thumbs Up
 My D3 Build Thread

TDV8 Retrofit Build Thread 
 
Post #185292431st Aug 2017 8:44 pm
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Scwede
 


Member Since: 31 Jul 2014
Location: Jönköping, Sweden
Posts: 301

Scotland 2012 Discovery 4 3.0 SDV6 HSE Auto Sumatra BlackDiscovery 4

Exactly Smile
 2012 Discovery 4 HSE Sumatra Black
2008 Discovery 3 HSE, Java Black
2010 Discovery 4 HSE, Stornoway Grey
2005 Discovery 3 HSE, Buckingham Blue
1987 Defender 90, some sort of grey
1983 Series 3 SWB, Ex Coastguard, Trafalgar Blue 
 
Post #185293431st Aug 2017 8:55 pm
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Philip1972
 


Member Since: 10 Mar 2017
Location: Gloucestershire
Posts: 1072

United Kingdom 2011 Discovery 4 3.0 SDV6 GS Auto Zermatt SilverDiscovery 4

I just read this and was going to post that it sounded like my wheel bearing.

Mine was also so bad I couldn't turn the wheel by hand lol.

Good result!
  
Post #185294731st Aug 2017 9:12 pm
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Scwede
 


Member Since: 31 Jul 2014
Location: Jönköping, Sweden
Posts: 301

Scotland 2012 Discovery 4 3.0 SDV6 HSE Auto Sumatra BlackDiscovery 4

Yes good result but I've never heard/seen a wheel bearing go so bad so quickly - but perhaps the car is so well sound proofed I just missed it.

Crunch, crunch, grind, scrape... Smile
 2012 Discovery 4 HSE Sumatra Black
2008 Discovery 3 HSE, Java Black
2010 Discovery 4 HSE, Stornoway Grey
2005 Discovery 3 HSE, Buckingham Blue
1987 Defender 90, some sort of grey
1983 Series 3 SWB, Ex Coastguard, Trafalgar Blue 
 
Post #18530221st Sep 2017 8:35 am
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