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Rev Fluctuation / Grinding Noise
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danstep24
 


Member Since: 27 Apr 2015
Location: Bristol
Posts: 3

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Barolo BlackDiscovery 3
Rev Fluctuation / Grinding Noise

Hi All

We have a 2005 TDV6 Auto HSE with 160k on the clock and for the last 10k the revs have been fluctuating, this is also accompanied by a grinding noise every time the revs jump and its been getting worse.

I have taken it to a few different garages in bristol. Ive had both EGR valves changed as they were apparently both not working and the hose for the turbo was replaced as it had a leak. Neither of these helped Big Cry

Does anyone know what this might be or have any suggestions for what I should be getting checked?


Thanks Very Happy
  
Post #146486027th Apr 2015 8:07 pm
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DN
D3 Decade 


Member Since: 23 Jun 2006
Location: W.London.
Posts: 2289

Ukraine 2006 Discovery 3 TDV6 Base 7 Seat Auto Zambezi SilverDiscovery 3

Have you checked the oil level in the auto box ? That would probably be the first job, but I'm afraid it does rather sound like a torque converter and/or auto g/box problem, and the damage may already have been done. Sad All the major drivetrain components on these vehicles need frequent oil changes, (more so than LR recommend), but sadly many owners do not bother with this until it is too late........I think 'Bristol Transmissions' have a good reputation, (from peeps views on this forum ),they may be able to advise you. Thumbs Up
  
Post #146489027th Apr 2015 8:27 pm
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danstep24
 


Member Since: 27 Apr 2015
Location: Bristol
Posts: 3

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Barolo BlackDiscovery 3

I haven't had it checked but will, Have contacted Bristol transmissions going to hopefully get in there soon and they said they would take it for a road test. Thank you for you the recommendation!
  
Post #146561829th Apr 2015 9:59 am
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geoff.
 


Member Since: 24 Jan 2010
Location: West kent
Posts: 8531

England 

if its been doing that for the last 10k you may have knackered your transmission
  
Post #146564429th Apr 2015 11:09 am
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dadon
 


Member Since: 06 May 2015
Location: Northants
Posts: 482

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

I have that during light acceleration. Revs are fluctuating and there is slight noise followed by revs dropping and once more revs going up grinding noise and revs going down..... Any official procedure to do?
Car is : LR3 05reg 118k full LR service.
  
Post #14709919th May 2015 2:13 pm
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NJSS
 


Member Since: 06 May 2009
Location: Catherington, Hampshire.
Posts: 10464

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Waitomo GreyDiscovery 4

dadon

Have you changed the gearbox oil, or better still had a MegaFlush?

NJSS
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2011 Mercedes Benz SL350 (R230)
1973 MG B GT V8 - 3.9L John Eales engine, 5 speed R380 gearbox, since 1975.
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Post #14710029th May 2015 2:58 pm
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 8043

England 2014 Discovery 4 3.0 SDV6 HSE Lux Auto Corris GreyDiscovery 4

When and how are the revs fluctuating? - if it's when you're stationary it's not the transmission.
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #14710409th May 2015 4:19 pm
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dadon
 


Member Since: 06 May 2015
Location: Northants
Posts: 482

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Megaflush hmmmmmm.... never I suppose as I just bought it. Im on the case with Geoff hopefully as I have PMd him and waiting for response.

Fluctuation happens 1800-2000 rpm when on cruise control doing 70PMH especially up the hills. We went to Sheffield on A1M Sat and Sunday trip and that was noticeable up the hills.
Also during acceleration. When I put my foot down it will drop 1 or 2 gears down, then will fluctuate constantly while climbing up the speedo.

When it happens I can hear slight grinding noise and instant de-acceleration follower by revs going up acceleration and grinding noise and RPM drops. Over and over again till I take my foot of acceleration or when road evens out.

Not sure about the performance, but acceleration is sluggish, hesitant compared to times when not fluctuating - I imagine that is normal. I have tried checking the fuel economy and on the way to Sheffield from Corby over A1M I have managed 27.2MPG driving 65-70MPH even tried following a white van for 20miles also 70MPH. All elec comfort seats, heaters a-con were off.

Is that normal? I have heard about someone here managing 40.4MPG on 10mile streshes on motorway tests.

thanks
  
Post #147207711th May 2015 3:34 pm
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danstep24
 


Member Since: 27 Apr 2015
Location: Bristol
Posts: 3

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Barolo BlackDiscovery 3

Hi All

It took me a while to get the D3 into Bristol transmissions! But they sorted the problem, it was the torque converter. They said they do a LOT of these with the same issue.
Car drives like new now! Very happy with the work Bristol transmissions have done!
Very Happy

Thanks again for all the advice!
  
Post #154576916th Oct 2015 4:05 pm
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Robbie
 


Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932

United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

M3DPO wrote:
When and how are the revs fluctuating? - if it's when you're stationary it's not the transmission.


It can be as the input shaft spins with the engine even in neutral & park.

danstep24 wrote:
Car drives like new now! Very happy with the work Bristol transmissions have done!


Excellent!

Thumbs Up
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Post #154581616th Oct 2015 5:40 pm
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faliriotis
 


Member Since: 19 Sep 2007
Location: Greece
Posts: 15


danstep24 wrote:

It took me a while to get the D3 into Bristol transmissions! But they sorted the problem, it was the torque converter. They said they do a LOT of these with the same issue.
Car drives like new now! Very happy with the work Bristol transmissions have done!

Hi Smile

Any chance you could give me a little bit of extra info on this? What exactly was it or how it was fixed? I have the same problem and I the workshop guys are in denial mode.
  
Post #174052028th Nov 2016 3:44 am
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Dixie Dean
 


Member Since: 06 May 2006
Location: Halewood
Posts: 298

2008 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

Quote:
Any chance you could give me a little bit of extra info on this?


faliriotis, LR's policy is for gearbox oil change at 240K kms, but forum experts agree that it should be at about every 100K kms.

Therefore they are prone to failure. Also a newer version of the torque converter has been manufactured which is better. Most also get the steel sump and removable oil filter fitted (which is a BMW part I think).

Further, some of those of us who are getting repairs due to not having changed the oil in the gearbox are also having separate oil cooling radiators fitted as the original is shared with the water system and is prone to leaking, causing the gearbox to fail. No point in getting the gearbox repaired for it to fail for a different reason. What else might need changing in your gearbox is down to it being examined. The solenoid block might need replacing or servicing.

Mine is going to Bristol in the morning for a new TC.
 2008 D3 HSE Stornoway Grey with Ebony Leather, towing a Coachman VIP 575  
Post #17601448th Jan 2017 9:40 pm
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faliriotis
 


Member Since: 19 Sep 2007
Location: Greece
Posts: 15


Hi Dixie Dean, many thanks for the info, it is very useful and greatly appreciated!

Thumbs Up
  
Post #176256313th Jan 2017 5:48 am
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plocker
 


Member Since: 14 Mar 2016
Location: Preston
Posts: 828

United Kingdom 2005 Discovery 3 4.4 V8 HSE Auto Bonatti GreyDiscovery 3

Finally bit the bullet and going to get mine looked at in the morning.

Anyone ever used Automatic Transmissions in Preston? Quoting £1000 + VAT if its the TC
 05 V8 HSE Bonatti Grey  
Post #176269513th Jan 2017 11:06 am
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gruntygrant
 


Member Since: 28 Dec 2011
Location: Pietermaritzburg
Posts: 13

South Africa 

Hi guys. Absolutely essential to do a megaflush max every 100,000 kms. Change all your coolant liquid, brake fluid and diff and trans box fluids every 50,000 kms and your Landy will treat you great.
  
Post #176270413th Jan 2017 11:26 am
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