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W124 driveline vibration
When I acquired my W124, the drive-shaft carrier bearing had completely failed. I marked both segments of the driveline with a paint marker before I removed it. Everything went back together fine. I used a new rubber carrier and a new bearing.
The flex disks both looked good, no cracks or fraying at all. The U-Joint appeared to operate normally. Both CV shafts and boots look good. The driveline has a vibration that presents itself at about 62 mph. My assumption is that either someone had the driveline out and didn't mark it, or perhaps a balance weight fell off. If I go pick up a wrecking yard driveline to rebuild, does it make sense to take new flex disks, carrier bearing and bolts in and have everything all balanced together? |
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the driveshafts are marked from the factory, one is a triangle with its other husband mark - you have to align both. There are heavier nuts available from MB to counter a vibration problem, They even have a solid rubber block that is bolted to the diff mounts in case of extremes.
Usually its best to do the easy stuff first. I also read somewhere that the carrier bearing can be shimmed to make up for lost alignment of the driveshaft. Another point to see is the driveshaft bushings on either end. |
I'll do the free thing first, climb under there and make sure the marks are lined-up. I read another comment about at least making sure the tabs are lined-up end to end (as in not off-set from each other); from memory, I couldn't even swear to that. Thanks!
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Maybe not the driveshaft, how about tires or tire balance?
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The sound, and the vibration sure seem to be coming from the center of the vehicle. Guess I could pay to have the wheels balanced. Tire shops are always cheesy though...they try to upsell, every time. |
Could be rear spring or transmission mount is bad then you got the wrong angle at the driveshaft.
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Engine mounts as well as the previously mentioned trans mount. Relatively easy to change. I'm fighting a driveline vibration as well, have not done mine yet.
Rgds, Chris W. |
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