My 300D has a slight vibration at highway speeds. It's sort of a rumble that occurs at intervals of a second or two... not a a constant virbation, and not violent at all. Barely perceptible. Hard to tell where it's coming from. It's always been there. I recently replaced both flex disks, the center bearing, and carrier, and a little before that replaced the motor and trans mounts. Replacing the center carrier removed some vibration at low speeds but the low frequency vibration is still there at high speeds, perhaps *slightly* reduced.
I was careful to mark the driveshaft halves and put them back together in the same alignment, but can't be certain that someone did not get them offset in the ~20 years time prior to my owning the car. Allan -- 1983 300D On Tue, 29 Mar 2011 09:08 -0500, "Dieselhead" <126die...@gmail.com> wrote: > The idea of swapping the shaft is a good one. Especially if you can > use a known smooth running driveshaft, complete with carrier bearing > and rubber. Here is why: This just occurred to me as I read your > post. ON the belt idler, the bearing is in the same place all the > time, moving maybe + - one degree or so. What happens there is that > the bearing wears into "grooves" if viewed parallel to the centerline > of the bearing. > > The U-joint in the driveshaft is the same thing. It is possible that > the ujoint seems tight, but is worn into grooves. The relative > weakness of the new rubber center "carrier bearing holder" may be ok > with a perfect shaft, but not stiff enough for the imperceptibly worn > u-joint, with grooves worn into it. > > I never got the vibration resolved. I drove it with the vibration for > years. On my car, it started after some yahoos took out the > driveshaft without my permission to start the work. > > > >I have a feeling this is the area I should concentrate; ensure the shaft is > >perfectly level, which if not, would certainly cause just such a vibration. > >Will pursue this angle further. Thanks. _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
