Author Topic: Very deep thump from back end  (Read 2096 times)

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Offline timewarrior

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Very deep thump from back end
« on: October 18, 2019, 06:46:08 pm »
Ok, weird issue, not causing problems but very curious to see what it is.

My R32 is parked on the flat in neutral with the engine off. Sitting inside as I was picking stuff off the floor I noticed a very deep thumping (sounded like it was coming from a long way off). Realised it was from me moving, coming from rear of car and amplified inside...

Got out and tried rocking car back and forth and there’s this deep thump coming from rear wheel assembly with every rock.  :-\

So not in gear so nothing connected. It it just noise from the rear differential? Presumably with engine off clutch in Haldex is disengaged so should there be a noise? Has anyone ever noticed this before? I do have a wheel bearing being replaced next week, could that be it? They’re supposed to rumble when they’re on the way out aren’t they?
94 Golf VR6 Dusty Mauve Pearl
05 Golf GTI Diamond Black Metallic
04 Golf R32 Reflex Silver Metallic

"The more I know, the more I don't pretend to know"

Offline the phantom

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Re: Very deep thump from back end
« Reply #1 on: October 19, 2019, 10:08:52 am »
best to get the mechanics to check it out when they do the wheel bearing
Land Transport New Zealand, taking the fun out of driving since August 2008

Offline superfueler

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Re: Very deep thump from back end
« Reply #2 on: October 20, 2019, 06:21:57 pm »
Hand brake on and off make any difference?
Current: 2010 Audi A4 2.7 TDI silver, 2017 Ford Ranger 3.2 Px2 DC frozen white.
Past: 2004 Golf R32 black pearlescent, 2009 Audi S3 white, 2004 Audi A4 B6 1.8T blue, 99 Golf mk4 GTI black, 2005 Audi A4 B7 2.0T black.

Offline timewarrior

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Re: Very deep thump from back end
« Reply #3 on: October 24, 2019, 05:13:23 pm »
Handbrake was off didn’t try with handbrake on.

Just picking up after wheel bearing, will see if that solved it  :)
94 Golf VR6 Dusty Mauve Pearl
05 Golf GTI Diamond Black Metallic
04 Golf R32 Reflex Silver Metallic

"The more I know, the more I don't pretend to know"

Offline timewarrior

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Re: Very deep thump from back end
« Reply #4 on: October 26, 2019, 11:48:38 am »
This was solved with a new wheel bearing  :D
94 Golf VR6 Dusty Mauve Pearl
05 Golf GTI Diamond Black Metallic
04 Golf R32 Reflex Silver Metallic

"The more I know, the more I don't pretend to know"

Offline superfueler

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Re: Very deep thump from back end
« Reply #5 on: March 12, 2020, 03:35:07 pm »
Good to know its been sorted.  :D

I now have a intermittent knocking noise coming from my R32's left front wheel area when driving in a straight line and below about 30 km/h. Installing new powerflex front sway bar bushes next week to see if that makes a difference.
Current: 2010 Audi A4 2.7 TDI silver, 2017 Ford Ranger 3.2 Px2 DC frozen white.
Past: 2004 Golf R32 black pearlescent, 2009 Audi S3 white, 2004 Audi A4 B6 1.8T blue, 99 Golf mk4 GTI black, 2005 Audi A4 B7 2.0T black.

Offline Pristle

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Re: Very deep thump from back end
« Reply #6 on: March 12, 2020, 04:19:48 pm »
I'd check ball joints when they do that job. Also link bushes.

Offline superfueler

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Re: Very deep thump from back end
« Reply #7 on: March 31, 2020, 01:13:49 pm »
Finally had some time yesterday to replace the R32's front sway bar bushes with powerflex ones. Nice easy job thanks to humble mechanic on youtube  :D
Test drive afterwards to the shop for milk and bread was smooth and no noises thus far.
Today is bath time for the car.
« Last Edit: March 31, 2020, 01:29:06 pm by superfueler »
Current: 2010 Audi A4 2.7 TDI silver, 2017 Ford Ranger 3.2 Px2 DC frozen white.
Past: 2004 Golf R32 black pearlescent, 2009 Audi S3 white, 2004 Audi A4 B6 1.8T blue, 99 Golf mk4 GTI black, 2005 Audi A4 B7 2.0T black.