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whining noise when pushing gas pedal
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LRthreeee
 


Member Since: 20 Apr 2018
Location: North Carolina
Posts: 3

United States 2006 LR3 4.4 V8 SE Auto Unknown ColourLR3
whining noise when pushing gas pedal

Hello everyone!

So I have this whining, high pitch noise coming from LR3 when speed>30MH and I am pushing the gas pedal. The moment I remove my foot from the gas it goes away. This noise sounds metallic to my ears. And it comes from the front half of the car. I think I can also feel a very subtle vibration on the steering wheel as well, which I think is coming from the same source that produces the whining noise. Both wining noise and vibration on the wheel are very subtle, but noticeable.

So far I flushed power steering fluid (which was very dark and burned) and have new fluid in the system, replaced fluids of both front and back differentials, as well as the transfer case. But the whining noise is still there.

As a test, I put the car in N (neutral) and give it a good gas, but no sign of whining noise.


So what I am dealing with here? Bad transfer case? Bad front differential? Or a bad hub bearing or power steering pump? Any idea would be very appreciated!

By the way, this is a 4.4 liter, automatic LR3 (US model).  
Post #194736923rd May 2018 2:25 am
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Mannesson
 


Member Since: 15 Jul 2017
Location: Lomma
Posts: 18

Sweden 2010 Discovery 4 3.0 TDV6 HSE Auto Santorini BlackDiscovery 4

I have a similar noise on my D4. Unfortunately it has not been solved or identified, but here are some threads where the issue is discussed:

https://www.disco4.com/forum/odd-noise-ideas-165445.html
https://www.disco4.com/forum/whining-noise-driving-161952.html

/Mans  
Post #194758923rd May 2018 8:22 pm
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LRthreeee
 


Member Since: 20 Apr 2018
Location: North Carolina
Posts: 3

United States 2006 LR3 4.4 V8 SE Auto Unknown ColourLR3

Thanks Mannesson for your reply.

I read your thread and watched your youtube, we might have a similiar issue!

One of the best, and maybe the only(?), good option left for us is to use those chassis ears and place them close to potential components that might be the source of this noise (transfer case, front dif, left and right front hub bearing, etc,...) and listen to them while driving in order to locate where the noise is coming from. The price tag for this system is like $100ish, and I am debating with myself whether buy it or just take the truck to my close indy Land Rover shop and let them do the diagnosis.  
Post #194767024th May 2018 1:44 am
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 4614

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

Can it be heard by someone standing on the side of the road as the vehicle passes by @30 mph?  
Post #194767224th May 2018 2:49 am
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LRthreeee
 


Member Since: 20 Apr 2018
Location: North Carolina
Posts: 3

United States 2006 LR3 4.4 V8 SE Auto Unknown ColourLR3

I don't know, haven't tried that! I have to say that the whining noise is subtle, but it is for sure there! I am not sure it is detectable from outside too or not.  
Post #194767324th May 2018 3:49 am
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Nasher
 


Member Since: 07 Mar 2009
Location: Clanfield, North of Pompey - UK
Posts: 2677

England 2016 Discovery 4 3.0 TDV6 HSE Lux Auto Loire BlueDiscovery 4
Re: whining noise when pushing gas pedal

LRthreeee wrote:


I have this whining, high pitch noise coming from LR3.

This noise comes from the front half of the car.

.


Have you tried driving it without Mrs LRthreeee in the passenger seat? Heaven doesn't want me, and hell is afraid I'll take over.  
Post #194770124th May 2018 8:51 am
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 4614

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

Rolling with laughter  
Post #194779724th May 2018 2:30 pm
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