Clunk noise as I pull away...?

born2boost · 29-02-2012, 01:16 PM

Hi Guys...

I am experiencing a light clunk noise when pulling away....what could it be? I've already upgraded the rear trailing arm bushes to Poly ones...

It sounds like it could be coming from the diff area?

Are there any common failure area's I should look at??

TIA...

shane@mbtech · 29-02-2012, 02:17 PM

Quote:

Originally Posted by born2boost

Hi Guys...

I am experiencing a light clunk noise when pulling away....what could it be? I've already upgraded the rear trailing arm bushes to Poly ones...

It sounds like it could be coming from the diff area?

Are there any common failure area's I should look at??

TIA...

The diff itself could be fubar-ed

sailorbaz · 29-02-2012, 03:59 PM

It probably is the diff, I'd get it checked out but wouldn't be overly worried about it. I got a new diff under warranty and even it clunks after only a couple of thousand miles. But best get it checked out to settle the head.

Barry C · 29-02-2012, 04:26 PM

hardly a tare in the boot floor?

get it checked out asap either way

NZ_M3 · 02-03-2012, 02:02 AM

Could be the diff bush itself (the front one or the rear left I think, can't recall) these go quite often.

Or worst case ripped rear floor can cause these type of noises too - pay to put the car up on the hoist to check.

The other possibility is the driveshaft rear bearing joint (the one connecting to the diff directly - check if there's excessive play.

If it's not the driveshaft, CV joints on the half shafts could cause this noise also - common failures.

born2boost · 02-03-2012, 10:49 AM

Hi guys...

Thank you for all the input...!

Had the car out at my (Ex BMW) mechanic...he's baffled about it as well...the cars not torn anywhere as is common, and all the bushes and mounts seems fine?

I guess I need to get the driveline checked...

Would an oil change in the diff help at all??

Thanks again...

29-02-2012, 01:16 PM	#1
born2boost S2 - Picking it up Join Date: Jan 2012 Posts: 32 Casino cash: $1481	Clunk noise as I pull away...? Hi Guys... I am experiencing a light clunk noise when pulling away....what could it be? I've already upgraded the rear trailing arm bushes to Poly ones... It sounds like it could be coming from the diff area? Are there any common failure area's I should look at?? TIA...

29-02-2012, 04:26 PM	#4
Barry C S5 - Full Throttle Join Date: Oct 2011 Location: Dublin, Ireland Posts: 300 Casino cash: $3349	hardly a tare in the boot floor? get it checked out asap either way

02-03-2012, 02:02 AM	#5
NZ_M3 S5, Sport On, DSC M-track Join Date: Jun 2008 Location: Auckland, New Zealand Posts: 1,434 Casino cash: $13579	Could be the diff bush itself (the front one or the rear left I think, can't recall) these go quite often. Or worst case ripped rear floor can cause these type of noises too - pay to put the car up on the hoist to check. The other possibility is the driveshaft rear bearing joint (the one connecting to the diff directly - check if there's excessive play. If it's not the driveshaft, CV joints on the half shafts could cause this noise also - common failures.

02-03-2012, 10:49 AM	#6
born2boost S2 - Picking it up Join Date: Jan 2012 Posts: 32 Casino cash: $1481	Hi guys... Thank you for all the input...! Had the car out at my (Ex BMW) mechanic...he's baffled about it as well...the cars not torn anywhere as is common, and all the bushes and mounts seems fine? I guess I need to get the driveline checked... Would an oil change in the diff help at all?? Thanks again...