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?