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Clunk when pulling away and slight rotational knock
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James1974
 


Member Since: 23 Nov 2017
Location: Stevenage
Posts: 990

United Kingdom 2010 Discovery 4 3.0 TDV6 XS Auto Barolo BlackDiscovery 4

Rear driveshafts
Put in neutral and see if you can twist the inner cv joints while the wheels are still on the ground
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Post #195668424th Jun 2018 5:01 pm
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willh92
 


Member Since: 15 Jan 2018
Location: Northamptonshire
Posts: 22

United Kingdom 2005 Discovery 4 3.0 TDV6 XS Auto Santorini BlackDiscovery 4

Ok cheers - I’ll get under it tomorrow evening.
  
Post #195669524th Jun 2018 5:45 pm
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willh92
 


Member Since: 15 Jan 2018
Location: Northamptonshire
Posts: 22

United Kingdom 2005 Discovery 4 3.0 TDV6 XS Auto Santorini BlackDiscovery 4

So I got the car up and checked everything for play, all bearing, all driveshafts and front prop. All calipers right, wheel nuts tight, everything as it should be.

No idea!!

It only seems to do this knocking when hot, I’ve not noticed it for a while when it’s cold ... could it be diff related? It also only does it if I’ve come to a complete stop, then pull away again.
  
Post #19604905th Jul 2018 9:02 pm
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Leo Disco
 


Member Since: 22 Dec 2013
Location: Newcastle
Posts: 210

United Kingdom 2008 Discovery 3 TDV6 XS Manual Stornoway GreyDiscovery 3

I have the same problem. I have also replaced the rear prop and its still there. Did you resolve it ?
  
Post #206186217th Jun 2019 10:19 pm
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Tripe
 


Member Since: 28 Jun 2015
Location: Tasmania
Posts: 285

Australia 2007 Discovery 3 TDV6 SE Auto Zermatt SilverDiscovery 3

James1974 wrote:
Rear driveshafts
Put in neutral and see if you can twist the inner cv joints while the wheels are still on the ground


+1 rear/ front drive shafts

Are you getting any noise, when placing vehicle into gear ? Before car has moved?
  
Post #206189618th Jun 2019 7:44 am
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Leo Disco
 


Member Since: 22 Dec 2013
Location: Newcastle
Posts: 210

United Kingdom 2008 Discovery 3 TDV6 XS Manual Stornoway GreyDiscovery 3

No putting it into gear is ok (its a manual). At slow speeds its clunking. I will have a look at the front drive shaft and jack up each wheel and check for movement.....then report back Thumbs Up
  
Post #206214218th Jun 2019 7:04 pm
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Leo Disco
 


Member Since: 22 Dec 2013
Location: Newcastle
Posts: 210

United Kingdom 2008 Discovery 3 TDV6 XS Manual Stornoway GreyDiscovery 3

So jacked car up and all rotation or lack of is as normal. It chunks when pulling away and you can feel it through the gearstick
  
Post #206239519th Jun 2019 5:11 pm
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Leo Disco
 


Member Since: 22 Dec 2013
Location: Newcastle
Posts: 210

United Kingdom 2008 Discovery 3 TDV6 XS Manual Stornoway GreyDiscovery 3

Jacked the car up and checked the play around the wheels and the front diff and all looked ok. Still no idea where the clonking is coming from Shocked
  
Post #206243419th Jun 2019 7:46 pm
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Leo Disco
 


Member Since: 22 Dec 2013
Location: Newcastle
Posts: 210

United Kingdom 2008 Discovery 3 TDV6 XS Manual Stornoway GreyDiscovery 3

Well replaced both props and rear brake shoes, pads a d discs. My clunking is still there! I have been under the car and nothing is loose. Anyone got any ideas ?
  
Post #206485729th Jun 2019 11:09 am
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Tripe
 


Member Since: 28 Jun 2015
Location: Tasmania
Posts: 285

Australia 2007 Discovery 3 TDV6 SE Auto Zermatt SilverDiscovery 3

Try the following:

Turn engine on, place park brake on, place one foot hard on brake pedal and use other foot to press down on clutch pedal, gently release clutch while being in 1st gear, to place some load on drivetrain and then place in reverse and repeat, ( this is the dangerous bit) while having someone under car, observing prop movement and driveshaft movement as load is placed on the CVs, prop and drive shafts

I did this (it’s easy in an automatic) and it showed the rear RHS driveshaft clunking as it rotated about 1/8 of a turn in the CV joint near diff, the CV was knackered.

Ordered and fitted new driveshaft and the clunk disappeared!!!!
  
Post #206487229th Jun 2019 12:17 pm
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ScottyMac
 


Member Since: 18 Jan 2020
Location: Cumbria
Posts: 2

2013 Discovery 4 3.0 TDV6 XS Auto Unknown ColourDiscovery 4
Fixed What Sounds Like This Issue

I know this is an old thread, but I had what sounds like this issue. It turned out to be a slow puncture on the passenger side front wheel bringing in the Dynamic Stability Control System or Traction Control (unsure which):


DYNAMIC STABILITY CONTROL
Dynamic Stability Control (DSC) optimises
vehicle stability, even in critical driving
situations. The system controls dynamic
stability when accelerating and when starting
from a standstill. Additionally, it identifies
unstable driving behaviour, such as understeer
and oversteer and helps to keep the vehicle
under control by manipulating the engine
output and applying the brakes at individual
wheels. Some noise may be generated when
the brakes are applied. The system is ready to
operate each time the engine is started

The symptoms were:

1. Initially a single thud or clunk from the rear end (like going over a "cats eye") when pulling away, between 5 and 10 miles per hour I think.
2. Then after about a week, 3 or 4 dull thuds or clunks inside about 1-1.5 seconds, the same "cats eye" type at the same kind of speed.
3. After about another 2-3 days I got the thuds and then a rumbling sound and slight feel of vibration. I didn't notice any degradation in performance.

So I trawled the forums for solutions and compiled a list of stuff I would check. The first and easiest was the drive shaft CV joints, there was nothing wrong with them.

While under the car, I happened to notice that the front left tyre looked low, I checked the pressure and sure enough it was at 1 bar.

I sorted out the tyre pressure and thereafter no clunking or rumbling.

Having had traction control kick in at low speed in the past due to rear bushes going bad, I came to the conclusion that the tyre issue was messing with the Traction Control or ABS. I looked into how the Traction Control system works and found the Dynamic Stability Control System description above. So for me it was a tyre issue, I don't know what else could bring in the DSC / Traction Control, bushes, etc?
  
Post #211393218th Jan 2020 7:27 pm
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