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03-04-2016, 07:47 PM | #1 |
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Bell noise coming from differential e92 m3 2009
I have a 2009 e92 m3 coupe w/ dct and 70k miles.
This recently started happening within the last 2 weeks. From a stop, right when I put my foot on the gas and accelerate it makes a bell noise, like metal hitting metal. Sounds like it's coming from the rear differential. It only does it instantaneously and then disappears once I start driving. Whenever I let off the gas (only at speeds of about less than 20mph) it makes this noise again. It seems like it makes this noise every time the car jerks forwards or backwards from accelerating or decelerating. I just took it to my friend's independent shop and they had it for 3 days and the only thing they could think to do was change the differential fluid and to replace the cracked flex shaft. I'm about to have to just resort to the dealership, but want to see if anyone has any idea of what is causing this. |
03-04-2016, 09:59 PM | #4 |
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Long shot here but are you guys sure you're not hearing the common cow bell noise that comes from getting a rock caught in the brake shield?
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03-04-2016, 11:41 PM | #5 | ||
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I did just get a differential flush with that new additive less than 100 miles ago so maybe it will go away after 500 miles or so? |
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03-05-2016, 08:30 PM | #6 |
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03-05-2016, 09:29 PM | #7 |
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Drives: '08 M3, '09 328xi Sport Wagon
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My M3 makes a similar sound.
Replaced the CV joint on the driveshaft and applied loctite to the splines on the differential input shaft and the sound is still there. It isn't the differential, in my case it's the center U-Joint on the driveshaft. So the only fix is a new driveshaft. |
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03-07-2016, 07:36 PM | #8 |
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Can anyone else confirm that this is the u-joint/drive shaft?
I took it to the dealer today to see if the u-joint was damaged and after charging me for the one hour diagnostic labor fee of $165 they came back and told me they'll need to charge me another 4.5 hours of labor because the exhaust needs to be removed, costing in the $800-$900 range. I told them that they sell brand new drive shafts for $900 so why on earth would I spend $900 just to tell me that it needs to be replaced. The 3 times I have been there they always remind me why I never go. |
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03-08-2016, 03:41 PM | #9 |
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Common problem. My SA stated it was a bent brake shield. Read this
http://www.m3post.com/forums/showthr...light=cow+bell |
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03-08-2016, 03:47 PM | #10 | |
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03-29-2016, 01:56 PM | #15 | |
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75k on mine and have already replaced the driveshaft cv joint, a rear axle and now the u-joint on the driveshaft is junk. |
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03-29-2016, 02:31 PM | #16 | |
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Iam also a little disappointed, thinking about the good old 03 cobra days pushing 600+ to the crank and the car had a bone stock driveline. Oh well, thats the downside of owning an german exotic car |
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04-09-2016, 11:33 AM | #17 | |
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Wish me luck, that this is the gremlin that causes these bell noises Will give you an headsup soon as I got it installed! |
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04-14-2016, 10:32 AM | #18 | |
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Thanks
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04-22-2016, 02:53 PM | #19 |
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There you go:
I officially confirm, these sounds do come from an worn out driveshaft. I replaced mine uppon this thread, as I had the exact noises! My car feels much better now accelerates much smoother and ain't got these nasty vibrations anymore!!!!!! Doogee, man...thanx a bunch!!!!! |
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04-22-2016, 03:15 PM | #20 | |
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04-22-2016, 03:20 PM | #21 | |
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Anyhow, we've found a great platform where we all support eachother. Man let me tell you, how hard would an ///M ownership be, without such a great forum AND much more greater members!!! This goes out to you and everyone on here, that helps fellow enthusiasts! |
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04-22-2016, 05:32 PM | #22 |
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Can anyone detail what's involved in swapping the driveshaft? Can it be diy'd?
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