Clunking when getting on/off the gas. Differential noise?

808MGuy · 09-01-2011, 12:50 PM

My dealer just changed the diff fluid and now I notice that there is a distinct clunking noise when I'm just moving at slow speeds (less than 20 MPH) and getting on or off the gas in 1st gear. Is that the diff noise everyone talks about where I need to get the additive put into the diff fluid or is this something else?

Krozi · 09-01-2011, 12:59 PM

Might be the differential bolt coming loose/breaking. It happens every now and then on our cars.

NYCM3ryder · 09-01-2011, 01:01 PM

yes i had the same problem it is either loose or one of them might be broken....

gthirtyfizle · 09-01-2011, 01:18 PM

I might b experiencing the same thing

NYCM3ryder · 09-01-2011, 01:26 PM

yea i had this issue. i thought my diff was going to fall out lol.. jus bring it to dealer tell them you were driving in traffic and all of the sudden you started hearing this. They will ask if you were doing launches or serious burn outs... the obvisous ans would be no and it should be covered under warrenty

Zba · 09-01-2011, 02:36 PM

Are we talking clunking and super jerky when letting on/off the gas even though you're trying to be super smooth?

808MGuy · 09-01-2011, 02:41 PM

Quote:

Originally Posted by Zba

Are we talking clunking and super jerky when letting on/off the gas even though you're trying to be super smooth?

Both.

Zba · 09-01-2011, 02:46 PM

I will have to investigate this as my car is doing something similar at 6000 miles, and I don't recall it being that way new. Thanks

tightie · 09-01-2011, 04:28 PM

Quote:

Originally Posted by Krozi

Might be the differential bolt coming loose/breaking. It happens every now and then on our cars.

+1

Zba · 09-01-2011, 07:36 PM

I just checked the torque on the two front bolts/nuts and they were loose. Not HAND loose mind you, but not at the proper torque. I torqued them to spec (68 nm or 58 ft/lbs) and will head home in a few. I will report back with an update on how she drives when I get home.

Zba · 09-01-2011, 10:21 PM

Well I am happy to say that was all it was. The degradation of driveability was very gradual, but when I started making apologies to my wife for sending her all over the place, I thought something was up.

09-01-2011, 12:50 PM	#1
808MGuy Colonel Drives: 2009 E90 M3 Join Date: Jun 2008 Location: Oahu, Hawaii Posts: 2,119 iTrader: (3)	Clunking when getting on/off the gas. Differential noise? My dealer just changed the diff fluid and now I notice that there is a distinct clunking noise when I'm just moving at slow speeds (less than 20 MPH) and getting on or off the gas in 1st gear. Is that the diff noise everyone talks about where I need to get the additive put into the diff fluid or is this something else? __________________ 09 E90 M3 - Interlagos Blue / Black Novillo / Sycamore Anthracite / Eibach / HRE
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09-01-2011, 12:59 PM	#2
Krozi Deutsche Jung aus Kölle Drives: 2008 E92 ///M3 Alpine White Join Date: Oct 2009 Location: SoFla - Bonita Springs Posts: 2,698 iTrader: (20)	Might be the differential bolt coming loose/breaking. It happens every now and then on our cars. __________________ 2008 E92 ///M3 Alpine White//Fox Red//6MT// Florida Bimmer - Join us on FaceBook!

09-01-2011, 01:01 PM	#3
NYCM3ryder Razzor Drives: JB E90 M3 Join Date: Aug 2010 Location: New York City Posts: 421 iTrader: (0)	yes i had the same problem it is either loose or one of them might be broken.... __________________ 2011 E90, 6 speed, premium package, technology package, winter package, comfort access,19's , EDC, moon roof, matt black grills, 15% carbon tints, ACS roof wing, IND painted reflectors, mfest black gloss m3badges, Mfest side window stickers, Tuner MS 15mm spacers, Carbon fiber M foot pedals, MS air filter, RPI air scoops, euro switch mod

09-01-2011, 01:26 PM	#5
NYCM3ryder Razzor Drives: JB E90 M3 Join Date: Aug 2010 Location: New York City Posts: 421 iTrader: (0)	yea i had this issue. i thought my diff was going to fall out lol.. jus bring it to dealer tell them you were driving in traffic and all of the sudden you started hearing this. They will ask if you were doing launches or serious burn outs... the obvisous ans would be no and it should be covered under warrenty __________________ 2011 E90, 6 speed, premium package, technology package, winter package, comfort access,19's , EDC, moon roof, matt black grills, 15% carbon tints, ACS roof wing, IND painted reflectors, mfest black gloss m3badges, Mfest side window stickers, Tuner MS 15mm spacers, Carbon fiber M foot pedals, MS air filter, RPI air scoops, euro switch mod

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09-01-2011, 01:18 PM	#4
gthirtyfizle Colonel Drives: E92 M3 AW Join Date: Jul 2008 Location: NYC Posts: 2,588 iTrader: (4)	I might b experiencing the same thing

09-01-2011, 02:36 PM	#6
Zba Lieutenant Drives: 2011.685 E92 M3 Join Date: Feb 2011 Location: Denver, CO Posts: 557 iTrader: (0) Garage List 2011.5 M3 [4.87]	Are we talking clunking and super jerky when letting on/off the gas even though you're trying to be super smooth?

09-01-2011, 02:46 PM	#8
Zba Lieutenant Drives: 2011.685 E92 M3 Join Date: Feb 2011 Location: Denver, CO Posts: 557 iTrader: (0) Garage List 2011.5 M3 [4.87]	I will have to investigate this as my car is doing something similar at 6000 miles, and I don't recall it being that way new. Thanks

09-01-2011, 07:36 PM	#10
Zba Lieutenant Drives: 2011.685 E92 M3 Join Date: Feb 2011 Location: Denver, CO Posts: 557 iTrader: (0) Garage List 2011.5 M3 [4.87]	I just checked the torque on the two front bolts/nuts and they were loose. Not HAND loose mind you, but not at the proper torque. I torqued them to spec (68 nm or 58 ft/lbs) and will head home in a few. I will report back with an update on how she drives when I get home.

09-01-2011, 10:21 PM	#11
Zba Lieutenant Drives: 2011.685 E92 M3 Join Date: Feb 2011 Location: Denver, CO Posts: 557 iTrader: (0) Garage List 2011.5 M3 [4.87]	Well I am happy to say that was all it was. The degradation of driveability was very gradual, but when I started making apologies to my wife for sending her all over the place, I thought something was up.