Znatan
Member Since: 03 Apr 2015
Location: Israel
Posts: 47
  
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I recorded it. Let's see if we talk the same..
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 1st Jul 2015 5:38 pm |
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Znatan
Member Since: 03 Apr 2015
Location: Israel
Posts: 47
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Srry. There are 2 slight accelerations after which u will hear the noise, sound up up when u watch ... Thanks
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| 1st Jul 2015 5:41 pm |
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ljmaslin
Member Since: 23 May 2014
Location: Southampton
Posts: 12
 
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I'm pretty sure I have this too. Check my profile to find my video... ☺ I've not found the problem yet either. Seems to coincide with auto box getting up to temp and happens when revs drop after releasing the accelerator. My revs also dip and come back up again. Which worries me a bit. I suspect the torque converter although I don't have any judders. Flush and Dr tranny made no difference. Might try 2nd flush and new filter.
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| 14th Jul 2015 5:40 pm |
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ljmaslin
Member Since: 23 May 2014
Location: Southampton
Posts: 12
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thanks for the info, I think 
So was this noise a symptom of the issue that caused you to get the box replaced?
i.e. Did you find out what it was and is it going to cause my box to explode?
I'm off to Belgium in it in a couple of weeks...
Basically mine's been doing this for the year or so that I've owned it.
I don't _think_ its getting worse.
Although the car is pretty noisy under load these days.
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| 15th Jul 2015 9:13 am |
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rogerc
Member Since: 16 Dec 2014
Location: São Paulo
Posts: 57
 
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MIne do the same as video and also when accelerating to 2000rpm, specially with the loaded car... any news on the topic?
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| 18th Sep 2015 4:59 pm |
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Redgull
Member Since: 30 Aug 2013
Location: East Sussex
Posts: 1127
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mine does it , and has done so since i have had it,no worse, start the car, stand by the door and rev up hard, listen to the air vent on the wing, it sucks air when you let off the pedal, thats what i think it is,
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| 18th Sep 2015 5:22 pm |
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Znatan
Member Since: 03 Apr 2015
Location: Israel
Posts: 47
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I didn't take care of it yet. Hearing it most of the time however. Don't know what to do actually. Replacing gear seems too much. Looking for somebody to explain and tell if fixable without putting kidney or somthsouth for sale
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| 19th Sep 2015 2:18 pm |
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anglefire
Member Since: 09 Mar 2010
Location: In the Club House
Posts: 4180
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Mine did it too before the rebuild - probably 12months or more - so 25-26K miles and at least 1 trip to the Pyrenees  Mark.
2006, D3 SE Auto - gone but not forgotten.
2014 BMW 530d M Sport Tourer.
1977 Triumph Spitfire 1500
_________________________________________________
Disco Picture Website Here
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| 19th Sep 2015 4:12 pm |
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REM
Member Since: 07 Oct 2015
Location: Lyon
Posts: 7
 
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Hi !
I have exactly the same noise on my 07... I was thinking that it's maybe a gearbox noise, but after a partial and soon after a total gearbox flush, absolutly no change... Also, to me the noise seems to be related to an air sound, not a mechanical sound...
I've seen this video with the same noise (from here or another forum, don't remember...), seems to talk about the turbo actuator 
I will follow this thread, I'm not so worried about this noise as my disco works perfectly.... for the moment 
Last edited by REM on 7th Oct 2015 10:13 am. Edited 2 times in total
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| 7th Oct 2015 9:48 am |
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Madrilleno
Member Since: 13 Oct 2014
Location: Nottingham
Posts: 1788
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Don't think I'd be sticking my arms around a spinning wheel like that! There are two rules for success,
1. Never tell everything you know.
D4 gone!
D5
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| 7th Oct 2015 10:04 am |
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Znatan
Member Since: 03 Apr 2015
Location: Israel
Posts: 47
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Hi, was anybody experiencing same noise able to solve it in any other way than changing TC?
Dr tranny is not the kind of solution I been looking for..
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| 15th Dec 2015 2:27 pm |
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rogerc
Member Since: 16 Dec 2014
Location: São Paulo
Posts: 57
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There is a lot of company that rebuild the TC... not sure if will sove...
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| 15th Dec 2015 3:31 pm |
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RomP
Member Since: 19 Aug 2016
Location: Centurion, Gauteng
Posts: 7
 
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I have exactly the same noise...Its is very specific to throttle position, torque, boost etc. I get this screeching noise from about 1500rpm, but gets much louder on 2000rpm...by "playing" with the throttle, I have get this sound to start or stop. Another thing I have noticed is that on a very long steep uphill, this sound gets worse and no matter what the throttle position it screeches terribly.
From my limited knowledge I am convinced its Turbo related...also when on very low rpm 1200 - 1500 I can also get this noise to come and go depending on how is play with the throttle...
Even on coasting at about 110km/h on about 2000rpm that screeching noise appears and stays there, depending on throttle position
My money is on an actuator that is faulty...Seems like throttle position and actuator vs boost are not quite "talking" to each other. Logic tells me that when in boost and if one decelerates, the actuator does not move back fast enough to reduce boost or it may be that its over-boosting..IE when throttle is closed its still trying to boost...hope this explains my understanding of this. The noise on my car is loud and unacceptable, so I'd like to get this sorted out...anyone else with a better diagnoses.
PS. most likely not the TC, I just had the gearbox to ZF South Africa with a new flush and they have confirmed no issues with the TC.
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| 19th Aug 2016 10:04 am |
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Skagg
Member Since: 15 May 2015
Location: Not where i'd like to be
Posts: 1044
 
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Did anybody get to the bottom of this?
The vacuum / hissing / sucking sound that isn't there when cold, but appears once the engine is warm & is only heard on either deceleration or when holding a steady speed?
Overriding thoughts seemed to be its the autobox, but whats the fault?
I have this fault on mine, it's been there for a couple of years. The box has always been a bit clunky in changing, especially downshifting, but otherwise worked reasonably well.
Any updates welcome!
MY16 D4 Landmark SDV6 (The Ice Maiden)
Uncle Ray's spare wheel protector
MY08 D3 HSE Stornoway (Miss Moneypit) The money tree withered......
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| 17th May 2017 8:12 pm |
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