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Gareth
Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26774
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Thanks Nick. It's not exactly like my symptoms. Mine are more noticeable when cruising at about 60mph, on smooth surface. If I use command shift to alter the revs, the rumble stays the same. I even tried putting it into neutral at 70 and coasting, the rumble was still there! So I don't think it is engine related. Will pass on the info though so they al least know I have researched for a cause. I'm going to swap tyres front to back to check if that makes a difference. I can't get it into the dealers for a fortnight.
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 30th Oct 2014 4:12 pm |
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LT
Member Since: 31 Dec 2005
Location: South West
Posts: 23823
 
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I suspect the tyres. I never experienced it with worn 19" Scorpion Zero's on my D3, but I think the compound has changed on the new Zero's and of course yours are 20".
Worn Goodyear Wranglers used to be noisy and the above comments about GG AT's are well documented here. 2006 D3 HSE (Original & still the best)-GONE
2010 D4 HSE (A bit bling)-GONE
2014 D4 HSE (Almost too bling)-GONE
2015 D4 HSE (A heated what?)-GONE
2016 D4 Landmark (Written Off)-GONE
2016 D4 Landmark (Surely the last!) PD1881 rims-GONE
2017 FFRR SDV8 Autobiography (now semi-retired)
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| 30th Oct 2014 5:08 pm |
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Gareth
Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26774
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Update on this. I had 4 new Pirelli Scorpion Zeros fitted today, and the grumble has gone! So obviously it was tyre resonance or something like it!
Actually only fitted 3 tyres, I used the spare and put the best of the old tyres under the back. I don't see the point in keeping a new tyre as spare.
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| 30th Jan 2015 7:28 pm |
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DSL
Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73079
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So just old knackered Scorps?
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| 30th Jan 2015 7:30 pm |
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Gareth
Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26774
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Looks like it.
When I had a look at the tyres that came off, the two rears were worn almost bald in the middle, with 2 mm at the outer edges. This indicates that I have been running them at too high a pressure  Always checked them regular, and kept at 36 most of the time.
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| 30th Jan 2015 7:32 pm |
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DSL
Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73079
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Good it's sorted, nothing worse than a grumble you can't pin down. 
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| 30th Jan 2015 7:40 pm |
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euangibson
Member Since: 24 Dec 2010
Location: Borders
Posts: 11027
 
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I honestly can't remember running a car that was more sensitive to tyres and tyre pressures..... "Better to remain silent and be thought a fool,than to speak out and remove all doubt" ?.....what rubbish...
Locking rear E-diff
RLD spare wheel protector & sump guard
Extended roof rails
Series 111 mudflaps
Black side tubes,grill and vents
Timed climate remote
Hids4u interior lights
D4 Firenze my2012 HSE
D3 Java 2005 SE manual (sold,sadly,thanks for the memories)
1966 '88 Series 2a....still starts in the morning better than I do...
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| 30th Jan 2015 7:45 pm |
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countrywide
Member Since: 16 Sep 2007
Location: UK
Posts: 6019
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I had the diff replaced and it turned out to be the tyres as well 
Least it is fixed
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| 30th Jan 2015 8:46 pm |
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euangibson
Member Since: 24 Dec 2010
Location: Borders
Posts: 11027
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Me too  "Better to remain silent and be thought a fool,than to speak out and remove all doubt" ?.....what rubbish...
Locking rear E-diff
RLD spare wheel protector & sump guard
Extended roof rails
Series 111 mudflaps
Black side tubes,grill and vents
Timed climate remote
Hids4u interior lights
D4 Firenze my2012 HSE
D3 Java 2005 SE manual (sold,sadly,thanks for the memories)
1966 '88 Series 2a....still starts in the morning better than I do...
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| 30th Jan 2015 9:00 pm |
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