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Knocking from Down Under!
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abermarc
 


Member Since: 06 Dec 2017
Location: Caerphilly
Posts: 238

Wales 2006 Discovery 3 TDV6 SE Manual Adriatic BlueDiscovery 3
Knocking from Down Under!

My 06 D3 developed a knocking noise last night and it was very noticeable on the way to work today. Here are the symptoms as I see them: -

1. I can only hear it as we start to accelerate at low'ish speed. After say 40mph I can no longer hear it but that could be due to road noise. Driving on normal level not potholed roads.

2. It seems to be coming from underneath/rear. I feel as though I can hear it more out of my right ear than my left.

3. it doesn't appear to affectthe handling or performance in any way

4. I've just been underneath and had a good shake/shove of everything I could see that might move and all seems quite normal..........though I am far from a mechanic! Give me a 90 and I'd be all over it, give me a D3 and I need help!

5. There is a significant amount of dried caked on mud underneath from our last Greenlane outting but we are talking well over a month ago now.

6. It sounds like a vague dull thud type of knock but it isn't a constant knock. It seemes a little irregular.

If I were driving a 90 I'd have said it sounds like a propshaft UJ on its way out if that's any help.

We are supposed to be going away tomorrow and towing trailer so if I need to get to bearmach for parts I need to get there today.

Any thoughts/opinions would be very much apreciated.
 Cogito ergo sum!

Disco 3 - Daisy - Ultimate combo of beast mode and comfort!
Defender 90 - Ruby - RIP Sad
Disco 1 - Lilly - Tame!
Disco 1 - Truck with no name - Beast!
Disco 1 - Bertie - Beast!
Sankey 'twintub' DIY Camper Conversion
South African Multii-Trail Custom Overland Trailer 
 
Post #19722509th Aug 2018 9:01 am
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grzesiul
 


Member Since: 11 May 2008
Location: UK
Posts: 6265

Poland 2016 Discovery 4 3.0 SDV6 SE Auto Loire BlueDiscovery 4

ARB bush?
  
Post #19722529th Aug 2018 9:32 am
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abermarc
 


Member Since: 06 Dec 2017
Location: Caerphilly
Posts: 238

Wales 2006 Discovery 3 TDV6 SE Manual Adriatic BlueDiscovery 3

Not sure. read about that elsewhere but general consensus seems to be that will only be a problem on uneven ground.

Seems I have inadvertently fixed it at least temporarily anyway! Another post suggested trying in low box see if noise still there. Well I did that, couldn't hear anything then flicked back into high and the noise is gone!
 Cogito ergo sum!

Disco 3 - Daisy - Ultimate combo of beast mode and comfort!
Defender 90 - Ruby - RIP Sad
Disco 1 - Lilly - Tame!
Disco 1 - Truck with no name - Beast!
Disco 1 - Bertie - Beast!
Sankey 'twintub' DIY Camper Conversion
South African Multii-Trail Custom Overland Trailer 
 
Post #19722589th Aug 2018 10:00 am
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johnlad
 


Member Since: 02 Dec 2016
Location: blackpool
Posts: 406

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

Have a look at centre bearing on rear prop shaft
  
Post #19722669th Aug 2018 10:22 am
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Hardware
 


Member Since: 28 Jun 2016
Location: Hiding under the M60
Posts: 12676

United Kingdom 2011 Discovery 4 3.0 SDV6 XS Auto Sumatra BlackDiscovery 4

and wash the mud off too ! could be hiding the root cause or potentially throwing something out of balance and be the actual cause.
  
Post #19722689th Aug 2018 10:27 am
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Discomadness
 


Member Since: 19 Jan 2015
Location: Caerphilly
Posts: 2256

Wales 2007 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

johnlad wrote:
Have a look at centre bearing on rear prop shaft


+1 that’s what mine sounded like. Thumbs Up
 Jarrod

Current : D3 2007 HSE - AKA the lemon
-beanie grille
-detango with led bulbs
-club body off rebuild. TWICE. 
 
Post #19722709th Aug 2018 10:30 am
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Ja92mie
 


Member Since: 16 Sep 2014
Location: Newquay
Posts: 1259

United Kingdom 2005 Discovery 3 TDV6 SE Manual Java BlackDiscovery 3

Same with mine! New rear prop cured the problem Thumbs Up
  
Post #19722759th Aug 2018 10:46 am
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abermarc
 


Member Since: 06 Dec 2017
Location: Caerphilly
Posts: 238

Wales 2006 Discovery 3 TDV6 SE Manual Adriatic BlueDiscovery 3

Pretty sure its not either prop now guys. Take a look at this. is my rear dif shot Sad

 Cogito ergo sum!

Disco 3 - Daisy - Ultimate combo of beast mode and comfort!
Defender 90 - Ruby - RIP Sad
Disco 1 - Lilly - Tame!
Disco 1 - Truck with no name - Beast!
Disco 1 - Bertie - Beast!
Sankey 'twintub' DIY Camper Conversion
South African Multii-Trail Custom Overland Trailer 
 
Post #197268510th Aug 2018 12:21 pm
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grzesiul
 


Member Since: 11 May 2008
Location: UK
Posts: 6265

Poland 2016 Discovery 4 3.0 SDV6 SE Auto Loire BlueDiscovery 4

wow do you have any oil in that diff now? hope it will be cheap fix
G
  
Post #197268610th Aug 2018 12:27 pm
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abermarc
 


Member Since: 06 Dec 2017
Location: Caerphilly
Posts: 238

Wales 2006 Discovery 3 TDV6 SE Manual Adriatic BlueDiscovery 3

Doubt it! Also, I'm 2 hours from home and have a trailer in tow!
 Cogito ergo sum!

Disco 3 - Daisy - Ultimate combo of beast mode and comfort!
Defender 90 - Ruby - RIP Sad
Disco 1 - Lilly - Tame!
Disco 1 - Truck with no name - Beast!
Disco 1 - Bertie - Beast!
Sankey 'twintub' DIY Camper Conversion
South African Multii-Trail Custom Overland Trailer 
 
Post #197268710th Aug 2018 12:29 pm
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abermarc
 


Member Since: 06 Dec 2017
Location: Caerphilly
Posts: 238

Wales 2006 Discovery 3 TDV6 SE Manual Adriatic BlueDiscovery 3

The knocking sound has now been replaced by a constant whine and the smell of burnt diff oil.
 Cogito ergo sum!

Disco 3 - Daisy - Ultimate combo of beast mode and comfort!
Defender 90 - Ruby - RIP Sad
Disco 1 - Lilly - Tame!
Disco 1 - Truck with no name - Beast!
Disco 1 - Bertie - Beast!
Sankey 'twintub' DIY Camper Conversion
South African Multii-Trail Custom Overland Trailer 
 
Post #197299411th Aug 2018 1:10 pm
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