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12-03-2012, 09:10 PM | #133 | |
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Maybe you can take that evidence (i.e. pictures) and get a second opinion from an independent specialist that is trustworthy while also finding out if can be done cheaper.
Having said that, I had my differential nearly fall out of the rear and luckily was covered by warranty. I had been complaining about it for over a month, and they gave the all clear the first time around, so probably was more an "open and shut case" because they gave a clean bill of health after I brought up the potential issue. Also, I had no impact, aggressive driving/tracking/launches/mods and someone from BMW NA did have to look at it and approve it (that's standard operating procedure for this type of expensive issue). Despite it being covered by warranty (where one could argue they could have done the minimum to fix the problem), they replaced the differential, rear subframe, fuel tank and part of the exhaust, claiming there was damage to each of these components because of the differential nearly falling out. The "list" price on all this stuff ( I saw the work order) was over $13k. You may also want to bring it up with BMW NA, or try to negotiate with the dealer if feel you can further argue the evidence is 100% conclusive that the bolt snap was impact related (2nd opinion also), given the prevalence of this issue. The mere threat of having the car towed to someone else may help your negotiating position (the dealer does include some margin on this type of stuff). Don't think anotherBMW dealer would yield better results, since the BMW NA reps that approve these typical service other dealers in the area. Perhaps a conversation with BMW NA and/or the BMW NA rep that looked at your car may yield more cooperation/better results. Best of luck. Quote:
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12-03-2012, 10:36 PM | #134 | |
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I do get that wheel hop now and again when the wheels are spinning... No clunking or anything abnormal yet (*knocks on wood*) Really tired of hearing stories about BMW's failure to take responsibility for things like this and their propensity to incessantly blame the owner.
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12-12-2012, 11:35 AM | #135 | ||
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I'm out warranty and it is a concern. |
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12-12-2012, 12:07 PM | #136 | |
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E92 M3 SG DCT - AA Filter, Verstraβe Paddles, ECS SS, MH race stud, Stoptech BBK, MR Exhaust,RE Pulley, BPM Tune,Euro bumper and GTS lip, Euro MDM & DCT, KW CS, Recaro PP, TMS Soild Diff Mounts, MRF solid subframe mounts, GTS aero, RPM track built motor.
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02-11-2013, 03:01 PM | #137 |
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Is there any TSB or anything like that on this problem? This seems to be a worthy TSB even though the evidence may be anecdotal.
I have 2012 model and I was assuming this would be for earlier models, but it seems it is a slate 2011 models according to this thread. A bit disappointed to think that these cars are meant to be driven hard but at the same time you have to think whether it will cause damages such as this.... |
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03-12-2013, 02:17 PM | #138 |
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wonder if the DEFIV diff brace is our solution: http://www.m3post.com/forums/showthread.php?t=814736
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04-20-2013, 07:23 PM | #139 | |
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Please note: the above is not to imply that I believe his particular case warrants a class action lawsuit or even a warranty repair. I simply don't think any of us in this thread can cite any hard numbers about this situation, much less any real facts of any relevancy, except for those few people who have dealt with this specific problem directly or who work for BMW. If you work for BMW or have had your diff bolt snap, I apologize, particularly in the latter case. |
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04-20-2013, 07:27 PM | #140 |
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Lute, that is not an acceptable answer and its not acceptable for the diff bolt to break even WITH abuse. This does not happen on other performance cars even within BMW lineup. Look at M5 or even M3 GTS. They use a different setup. Drivers habits should be taken into account and testing should have uncovered it.
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04-21-2013, 02:17 AM | #141 |
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It's highly probable that BMW is covering way more than 1% of bolt snap issues (as they did with mine). If that is true then it isn't only driver launching issues causing bolt failure failure. The differential design was changed in the M5, M3 GTS/CRT, and will be the case for all future M cars, including the new M3/M4. That fact alone in and of itself is an admission of a design flaw and taken together with quite a few M3 owners' getting bolt snap/full differentials replaced under warranty would point to the same conclusion, i.e. design flaw.
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04-24-2013, 10:41 PM | #142 |
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Just a update for you guys.
Finally herd back from the dealer with my car being there for almost a full 7days and still have not got it back. So the service advisor says that we want to make our customers happy and blah blah and we will repair your car and all but you have to come in and sign a document stating that this damage was due to drivers error and if it ever happens again they will not cover it. That's complete bullshit and I will not be signing no such forum. If it happened at 800 miles it will most likely happen alot more then once between now and 50,000 miles! Taking the matter to my lawyer so just a heads up to all u fellow e92 m3 owners don't give these people a dime and fight for what's right. |
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09-30-2013, 04:55 PM | #145 |
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10-31-2013, 10:48 PM | #148 |
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I've read this thread because I heard some very light metallic pinging noise today like someone throwing a small pebble at a large empty can 5 times from the back of the car while taking a slow sharp right turn right after being stopped at a red light. This is a completely bone stock new car that was just serviced for the 1200 miles service. This occurred twice today and never before. I am a conservative and careful driver. I have never driven the car hardcore, never floored the throttle, never red lined it, and never done any launch. Do not even try that angle of question because this car was broken in as per the book and I just progressively started to do more sporty drives, nothing radical. What could this be ?? Is this thread relevant to the noise I am hearing ?
I first thought i needed the alternative differential fluid but upon checking the part # they used 2282583 Final-drive gear oil SAF-XJ which is the alternative one already, not the original 83-22-1-467-993 one. Last edited by V8FunNaturally; 10-31-2013 at 10:54 PM.. |
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11-01-2013, 05:46 PM | #149 | |
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bmw p/n 83 22 2 282 583 SAE 75W-140 SAF-XJ + FM BOOSTER I think when you order this you get three 0.5L bottles. ? CORRECT 1M Fluids List Engine, Transmission, Differential http://www.1addicts.com/forums/showthread.php?t=620282 Also since you never heard this sound before your 1,200 mile service... maybe the diff oil is under filled. I think you should first check your dff fluid level. Then maybe switch over to the +FM fluid. Dack
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11-01-2013, 07:22 PM | #150 | |
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Can one check the diff fluid level electronically or is there a visual level indicator ? Yes from the work order I can see they used 3 bottles (3.000 PC) so how could they underfill it ? (This forum DIY sticky on replacing the diff fluid says it is thick and you have to press the bottle to get it out). Thanks for the pictures ! If the level is fine should i request a change to the + FM Booster version ? The sound is not loud but suspicious. I read the bulletin about diff grinding sound but that is not what I am hearing. I hear like a sound similar to a needle that is lightly bent on a another metal piece just when it slides off the edge and springs back straight (but louder than a normal needle). It would make that pinging sound 5 to 6 times during a very slow sharp turn. Now get this, the 1200 service was done directly by BMWNA at the processing center (ED car). I got the work order and found they had missed the MT oil change so the dealer did it when the car got here. Quite disappointing from the VDC, if they cannot get this right then who can ?! I would probably never had known had i not insisted on getting the detailed work order to check it. Do we have to ship our cars back to Germany each time service is due to get it done right ? Last edited by V8FunNaturally; 11-01-2013 at 07:49 PM.. |
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11-02-2013, 02:23 AM | #151 | |
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The way to check the diff(and manual trans) fluid is to have the car on a lift perfectly level and remove the 14mm hex (upper)plug. When you remove the plug the fluid level should be LEVEL with that fill hole(or sometimes a little bit spills out of it, or your put your finger inside the hole to see how low the oil is). That is the only way to check it.
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11-02-2013, 09:24 PM | #152 | |
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I do not have a lift, I have not checked the level. I will see if the noise comes back in the next few days. I took the same kind of drive today than two days ago. |
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11-03-2013, 07:11 AM | #153 | |
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When BMW has a diff that makes noise then will change the fluid first to this SAF-XJ+FM and then the tech will take the car to a parking lot and do 20 tight turns(full lock) left and then right. This will heat up the diff clutches and the fluid will get up in there. Then you won't have any more noises. But the noise is a different sort of noise from what you describe. Its more of a wobble or vibration type. The next time you hear the noise make a video of it so you can show it to your dealer. Good Luck, Dackel
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11-03-2013, 04:43 PM | #154 |
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Could it be a stone caught up in the rear disk brake rain shield?
Typical diff clutch pack noise is more of a rubbing groaning noise than a metallic pinging. The oem fill for the diff is castrol SAF-XJ which already contains friction modifiers (not to be confused with the BMW customised version with even more friction modifiers). I sometime wonder if the noisy diffs are caused by dealers replacing the SAF-XJ diff oil with some other less suitable alternative LSD oil. |
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