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D3 - Transmission Gearboxes, diffs, drive shafts.

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Old 1st September 2017, 08:33 AM
lackovicj lackovicj is offline
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Default rusted noise

Hi

When I floor the pedal I can hear rusted noise(like screwing rusted nut) for 1/2 second.

Anybody have an idea what could be?

A8 d3 2003 3.7 petrol


Thank you
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  #2  
Old 1st September 2017, 09:18 AM
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Check the kickdown switch behind the pedal? Might be loose or broken.
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Old 1st September 2017, 09:36 AM
lackovicj lackovicj is offline
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HI

Thanks for a reply I will check the kickdown switch.
It sounds more like from underneath of the car,,,between the engine bay and transmission. Is very hard identify where is coming from or just record the noise.
Noise in a level of : rpms between of critical and over-critical rpms, kind of resonating or as i said screwing rusted nut on the screw.

It does not happen when pressing the pedal slowly,,only while flooring the pedal firmly.

Thank you
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Old 1st September 2017, 09:46 AM
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Quote:
Originally Posted by lackovicj View Post
HI

Thanks for a reply I will check the kickdown switch.
It sounds more like from underneath of the car,,,between the engine bay and transmission. Is very hard identify where is coming from or just record the noise.
Noise in a level of : rpms between of critical and over-critical rpms, kind of resonating or as i said screwing rusted nut on the screw.

It does not happen when pressing the pedal slowly,,only while flooring the pedal firmly.

Thank you
Possibly propshaft CV joint when put under the strain of a kickdown?
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  #5  
Old 26th September 2017, 10:57 AM
lackovicj lackovicj is offline
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Kick down switch operating as normal.
not sure about the CV joint as the noise appear even when cruising on 50mph and then just floor the pedal..1/2 second of noise and thats all.
I might not be correctlty describing the noise i getting.
If someone lives around SE/Lewisham I can pop in and floor the pedal for you.
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Old 26th September 2017, 12:11 PM
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Very long shot, but can it be low on gearbox fluid ?

If so, it can cavitate under acceleration and the bubbles in the oil make a brief whistling sound.

It would be more prominent when cold, and would happen at idle revving in park as well as when driving....
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Old 26th September 2017, 12:46 PM
lackovicj lackovicj is offline
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Quote:
Originally Posted by IT View Post
Very long shot, but can it be low on gearbox fluid ?

If so, it can cavitate under acceleration and the bubbles in the oil make a brief whistling sound.

It would be more prominent when cold, and would happen at idle revving in park as well as when driving....

I thought about the gearbox oil but wanted to clarify frist before stealer takes 230 for gearbox oil + filter.
It makes the noise whether is cold or hot but only when you floor it at any speed..1/2sec of wriiim or sort of
I never floored the pedal while in idle but did rev it up to 4k but no noise.
is barelly noticeble and passanger dont notice the noise..only when I ask did you hear it?? what?? that wriim..nooo I did not...once I floor it 2x they say oh yes..
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Old 26th September 2017, 12:51 PM
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Hmm... maybe its not the fluid then.

But defo don't take it to a stealer, or get a full flush at this stage.

You just want the level checked and topped up if necessary which any competent gearbox specialist should do for a fraction of that cost.
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The 17 year old Learner Driver Wagon 2015 Skoda Citigo Monte Carlo. Alloys, Power steering, Aircon, Leccy windows, Sat Nav, bluetooth, central locking, cup holders, 59 whole bhp. Million times better than my first car. Well jealous.....

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Standard Kit (In Audi Speak): Quattro, PDC with Reversing camera, (Completely) Keyless entry/start, Electric memory seats Steering wheel and Mirrors with easy entry, Adaptive Cruise Control, Traffic Jam Assist, D3 Bose Equivalent Audio (imo), Fixed Panoramic sunroof, Auto dim heated memory folding dipping mirrors, Hi beam assist, LED headlights, 20" Alloys, Coming home lights, Auxiliary heating (and cooling), remote boot release (front and back), DAB radio, side assist, lane assist, heated seats x 5, dual zone climate control, tyre pressure monitoring, red brake callipers

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The First 20 Audis:

2001 D2 4.2 QS Silver, 1997 D2 S8 Silver, 1999 D2 4.2 Silver, 2002 D2 S8 Dolphin Grey,
2003 C5 RS6 Blue, 1998 D2 S8 Black, 2000 D2 4.2 QS/S8 Ming Blue, 2003 D3 4.2 Ming Blue,
2005 B7 S4 Blue, 2006 D3 3.0 Tdi Black, 1999 D2 4.2 Silver, 2003 D3 4.2 LPG Crystal Blue,
2000 D2 S8 Silver, 2007 3.0 Tdi Q7 Black, 2009 B8 S4 Black, 1998 D2 S8 Agate Grey,
2006 D3 4.2 Tdi Blue, 2006 D3 S8, 2007 Q7 3.0 Tdi, 2006 C6 S6,

The Second 20 Audis:

2011 A7 Sline, 2001 A2 1.4 Tdi Black, 2002 A2 1.4 Tdi Silver, 2006 A8 4.2 Tdi Blue,
2007 4.2 Tdi Q7, 2006 S4 Cab Silver, 2010 RS6 Saloon Black , 2007 TT Roadster,
2010 A8 D4 4.2 Silver, 2006 C6 A6 2.7 Tdi Quattro, 2000 D2 4.2 QS/S8 Ming Blue (again), 2008 Q7 4.2 Black,
2009 C6 RS6 Saloon Daytona Grey, 2001 Fully Loaded A2 Tdi, 2006 Avant S6 Black, 2007 VW Caravelle Exec Black (almost an Audi)
2009 TT Roadster Daytona, 2015 Q7 4.2 tdi lava grey, 2002 GmbH D2 demonstrator, 2006 D3 A8 LWB 4.2 Tdi Black

Most Recent Audis:

2001 A2 1.4 Tdi Black, 2007 4.2 FSi Q7 ABT Blue, 2016 S5 Coupe Launch model, 2004 S4 B6 Cabriolet, 2016 Q7 Sline White, 2006 Q7 4.2 FSi Black
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Old 26th September 2017, 01:10 PM
lackovicj lackovicj is offline
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Quote:
Originally Posted by IT View Post
Hmm... maybe its not the fluid then.

But defo don't take it to a stealer, or get a full flush at this stage.

You just want the level checked and topped up if necessary which any competent gearbox specialist should do for a fraction of that cost.

I preffer to watch what is getting done on my car or even better getting it done by myself however I have a driveway only not a ramp..Sometimes mechanics taking shortcuts when is a dirty job, like a droppoing the gearbox pan cleaning, changing the filter. When I say change the filter even is no need doing they might say we did that..few months later you go under the car and you realize the pan has never been taken off
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Old 30th September 2017, 09:49 AM
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Could it be a noise that can be described as an owl hoot? Is the car fairly high mileage? If so is likely known issue with the gearbox which requires replacement of the oil - ie full flush and replacement with a different grade of ATF, lifegaurd8 or some such. I believe the noise is the Torque converter clutch slipping. Is it particularly prevalent going in and out of third gear?
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