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brief noise under load during acceleration - !!!update!!!
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sacimiddx
 


Member Since: 09 Mar 2007
Location: hants
Posts: 2142

United Kingdom 2014 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4
brief noise under load during acceleration - !!!update!!!

slight brief noise has developed when car is accelerating from rest briefly at about 25 mph as it goes up thru revs, then happens again at about 30mph after a gear change (autobox)

much more pronounced under increased load (eg horsebox uphill !)

sounds like it may be transmission related issue (gearbox ? diff ?)

quite difficult to detect so I thought I'd post and see if anyone has similar issue before I take to dealer

it's getting worse over about 6 weeks)

Thanks for you help chaps
 Illegitimi Non Carborundum 

Last edited by sacimiddx on 21st Jan 2011 4:10 pm. Edited 1 time in total 
Post #7406373rd Jan 2011 6:09 pm
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DiscoDunc
 


Member Since: 08 May 2006
Location: Bristol
Posts: 16390

England 2010 Discovery 4 3.0 SDV6 HSE Auto Aintree GreenDiscovery 4

what kind of noise ?

whistle, whine, screech etc etc

or is it the radio getting louder Whistle
 Duncan
-----------------------------------------------------
If I'd known I was going to be so thirsty this morning I'd have drunk more beer last night.
FFRR Autobiography 4.4 SDV8 MY17
D4 HSE MY13 SOLD
FFRR 3.6 Vogue TDV8 SOLD
D4 HSE MY10 SOLD
D4 SE TECH MY15 SOLD
D4 XS MY12 SOLD
D4 HSE MY10 SOLD
D3 HSE MY06 - Re-Cycled Worldwide 
 
Post #7406393rd Jan 2011 6:12 pm
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sacimiddx
 


Member Since: 09 Mar 2007
Location: hants
Posts: 2142

United Kingdom 2014 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

lowish frequency almost like someone humming badly

happens with radio off !

(ps - driving me 'kin mad )
 Illegitimi Non Carborundum  
Post #7406413rd Jan 2011 6:13 pm
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DiscoDunc
 


Member Since: 08 May 2006
Location: Bristol
Posts: 16390

England 2010 Discovery 4 3.0 SDV6 HSE Auto Aintree GreenDiscovery 4

if it was the diffs it would be the same regardless of gearchange.

have you had the gearbox oil changed.

i used to get a humming noise at 70mph to 80mph - did gearbox flush and not had it since
 Duncan
-----------------------------------------------------
If I'd known I was going to be so thirsty this morning I'd have drunk more beer last night.
FFRR Autobiography 4.4 SDV8 MY17
D4 HSE MY13 SOLD
FFRR 3.6 Vogue TDV8 SOLD
D4 HSE MY10 SOLD
D4 SE TECH MY15 SOLD
D4 XS MY12 SOLD
D4 HSE MY10 SOLD
D3 HSE MY06 - Re-Cycled Worldwide 
 
Post #7406433rd Jan 2011 6:16 pm
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sacimiddx
 


Member Since: 09 Mar 2007
Location: hants
Posts: 2142

United Kingdom 2014 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

good point on the diffs

no oil change on autobox as yet (car only done 10k)
 Illegitimi Non Carborundum  
Post #7406453rd Jan 2011 6:18 pm
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DiscoDunc
 


Member Since: 08 May 2006
Location: Bristol
Posts: 16390

England 2010 Discovery 4 3.0 SDV6 HSE Auto Aintree GreenDiscovery 4

back to dealer then - let them sort it Thumbs Up
 Duncan
-----------------------------------------------------
If I'd known I was going to be so thirsty this morning I'd have drunk more beer last night.
FFRR Autobiography 4.4 SDV8 MY17
D4 HSE MY13 SOLD
FFRR 3.6 Vogue TDV8 SOLD
D4 HSE MY10 SOLD
D4 SE TECH MY15 SOLD
D4 XS MY12 SOLD
D4 HSE MY10 SOLD
D3 HSE MY06 - Re-Cycled Worldwide 
 
Post #7406533rd Jan 2011 6:26 pm
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sacimiddx
 


Member Since: 09 Mar 2007
Location: hants
Posts: 2142

United Kingdom 2014 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

looks like

not looking forward to the 'we couldn't hear anything' discussion
 Illegitimi Non Carborundum  
Post #7406733rd Jan 2011 6:51 pm
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JF Lux
 


Member Since: 08 Sep 2007
Location: A little country in Europe
Posts: 3522

Luxembourg 2008 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

sounds like the same "noise" that I currently have. Can you also "feel" the noise (if that makes sense) through the steering wheel and pedals...?

I'm booked into the dealer tomorrow for them to take a look. I'll let you know what they say Thumbs Up
 The next American ex-pat that calls it a "truck" is going to find out what 2.7 tons feels like on their foot...

Club "yes, I too have had the EGR's replaced..."
Club "yes, I too have had the compressor replaced..."
Club "yes, I too once had the car at the dealer for a couple of weeks nearly 4 weeks over 4 weeks...5 weeks"
Club "yes, I too have had EPB failure..."
Club "yes, I too get mysterious bings and bongs..." 
 
Post #7407003rd Jan 2011 7:23 pm
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sacimiddx
 


Member Since: 09 Mar 2007
Location: hants
Posts: 2142

United Kingdom 2014 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

think I can feel it but wouldn't bet the house on it

any feed back will be gratefully received
 Illegitimi Non Carborundum  
Post #7407023rd Jan 2011 7:26 pm
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JF Lux
 


Member Since: 08 Sep 2007
Location: A little country in Europe
Posts: 3522

Luxembourg 2008 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

sacimiddx wrote:
think I can feel it but wouldn't bet the house on it


exactly know what you mean...which is why it has taken me ages (as in a few months) to really believe "something" is there. The D3 was at the dealer just before Christmas so they could check it - they replaced one drive shaft and one wheel bearing so we thought that was the problem...obviously not...
 The next American ex-pat that calls it a "truck" is going to find out what 2.7 tons feels like on their foot...

Club "yes, I too have had the EGR's replaced..."
Club "yes, I too have had the compressor replaced..."
Club "yes, I too once had the car at the dealer for a couple of weeks nearly 4 weeks over 4 weeks...5 weeks"
Club "yes, I too have had EPB failure..."
Club "yes, I too get mysterious bings and bongs..." 
 
Post #7407073rd Jan 2011 7:37 pm
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jamesbond007
 


Member Since: 26 Jan 2010
Location: Algarve, Portugal
Posts: 263

Portugal 2006 Discovery 3 TDV6 SE Auto Tonga GreenDiscovery 3

JF Lux wrote:
sounds like the same "noise" that I currently have. Can you also "feel" the noise (if that makes sense) through the steering wheel and pedals...?



Same here. Dealer blames it on the AT2s.... Rolling Eyes
 The older I get, the better I was.

Discovery 3 TDV6 Auto (BAS remap) after Defender TD4 110 Crew Cab and 1964 SIIA 88. 
 
Post #7409444th Jan 2011 1:33 pm
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crwoody
 


Member Since: 09 Mar 2009
Location: Littleborough
Posts: 2109

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

I've had a similar(?) thing with mine for ages now, I get a low frequency "drone" at 1500 RPM under a slight load, like a resonance, sounds a bit like a wheel bearing/tyre noise but obviously not, as it only occurs at a very specific engine speed and independent of road speed.

I had a megaflush done last year to resolve some auto box issues I had at the time, I thought the noise/vibration may have been related to the torque converter, but while the flush fixed the other issues, it made no difference whatsoever to the 1500 RPM noise.

I just ignore it now and will start worrying again only if it gets worse.
 Clive

 
 
Post #7410134th Jan 2011 3:46 pm
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JF Lux
 


Member Since: 08 Sep 2007
Location: A little country in Europe
Posts: 3522

Luxembourg 2008 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

well picked the D3 up from the dealer....they couldn't find anything. I do trust my dealer and the workshop manager. He had done a test drive at various speeds and had the car up on the hoist so they could run the car and listen to the diffs - nothing to report. The wheel bearings and drive shafts have been checked (one of each replaced just before Christmas).

"something" is there - that "low frequency drone" as crwoody states. The workshop manager also believes me as well so we will give it a couple of weeks and then go for a drive together.

However, I am now beginning to think it is "one of those things" but will keep an eye on it (or an ear out for it...)
 The next American ex-pat that calls it a "truck" is going to find out what 2.7 tons feels like on their foot...

Club "yes, I too have had the EGR's replaced..."
Club "yes, I too have had the compressor replaced..."
Club "yes, I too once had the car at the dealer for a couple of weeks nearly 4 weeks over 4 weeks...5 weeks"
Club "yes, I too have had EPB failure..."
Club "yes, I too get mysterious bings and bongs..." 
 
Post #7410754th Jan 2011 5:31 pm
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sacimiddx
 


Member Since: 09 Mar 2007
Location: hants
Posts: 2142

United Kingdom 2014 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

JF Lux

Thanks for feedback - I guess somethings up
I feel a lot of people may not notice it at all

Lets hope I don't fully identify the problem on the autoroute to Switzerland when the family goes skiing in feb !

I'll let you know of any developments
 Illegitimi Non Carborundum  
Post #7410864th Jan 2011 5:49 pm
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JF Lux
 


Member Since: 08 Sep 2007
Location: A little country in Europe
Posts: 3522

Luxembourg 2008 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

sacimiddx wrote:
Lets hope I don't fully identify the problem on the autoroute to Switzerland when the family goes skiing in feb !


don't worry - considering I've a weekend driving through the Ardennes followed by a weekend through Snowdonia before your Swiss trip, I think I will find out first Laughing
 The next American ex-pat that calls it a "truck" is going to find out what 2.7 tons feels like on their foot...

Club "yes, I too have had the EGR's replaced..."
Club "yes, I too have had the compressor replaced..."
Club "yes, I too once had the car at the dealer for a couple of weeks nearly 4 weeks over 4 weeks...5 weeks"
Club "yes, I too have had EPB failure..."
Club "yes, I too get mysterious bings and bongs..." 
 
Post #7410954th Jan 2011 6:42 pm
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