11-23-2020, 09:23 PM | #68 |
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FINALLY!!
After 11 days in the shop, a new rear flex disc and U-joint, 5 bent wheels straightened, 11 wheels balanced, 2 new rims, and 2 new tires the shaking is gone! |
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11-23-2020, 09:24 PM | #69 |
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11-24-2020, 09:54 AM | #70 | |
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11-24-2020, 09:56 AM | #71 |
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My 640 is smooth as hell and not noisy. In sport or sport plus, I get a nice throaty exhaust but not loud.
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11-26-2020, 05:28 PM | #73 |
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If you haven't already diagnosed this issue I would check out the flex discs and main driveshaft bearing. Worn flex discs could cause vibrations which feels similar to wheels out of balance. Not uncommon on engines with lot of tourqe even on low mileage. I've seen it several times.
Edit: lol, just seen that you solved the problem. |
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11-28-2020, 08:25 AM | #74 | |
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Drives: 650i GC
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Location: NJ
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11-28-2020, 08:45 AM | #75 |
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Drives: 650i GC
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12-12-2020, 08:33 AM | #76 |
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I have a 2017, 650i Coupe, M package, recently bought as a CPO, with 30K miles on it. the shaking described in the thread is exactly what I am experiencing. Had the car into the dealer twice now. New rims, new tires, still does the same thing. Now told by BMW corporate that this is a "Normal Characteristic" for this car, window sticker $ 105,000. My next stop is legal action. The car is now officially impossible to even resell, without disclosing this issue. Happy to hear from anyone who have had success dealing with BMW to find a resolution.
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12-12-2020, 10:03 AM | #77 |
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Well that is total BS. When everything is right this car drives smooth as silk at any speed. I'd be looking at the two rubber flex disks (Guibo's) on the drive shaft. You can only see the rear one as in this picture. Mine had some cracks but that more or less normal wear and doesn't not affect the performance of the car at all.
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12-12-2020, 03:11 PM | #78 |
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Thanks Walt,
My dealer has given up. Next stop is BMW Corporate. The problem most likely stems from the torque converter, the problem goes away when driving in Sport mode, aka when the torque converter is locked, which is not feasible for every day driving. It is apparently a well known problem at BMW, with this particular package combination. I can't wait to hear where in the promotional literature, it says that a special feature of this car is the vibration mode at highway speeds, it is a normal characteristic which we built onto the car for you! |
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02-16-2021, 06:26 PM | #79 | |
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02-23-2021, 08:21 AM | #80 | ||
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01-30-2023, 02:14 AM | #81 |
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Check you drive shaft is balanced
most people dont check their drive shafts, they must be balanced. I put on an aftermarket, and had the same issue until I took it in to a shop and they balanced it. PERFECT!! Now, I have other issues~~~
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