Driveshaft shimmy: csb or bad ujoints?

[Balleristic31]

So my new eta has a bit of a shimmy from the mid driveshaft area in 1st and 2nd gear at low rpms.

Is this most likely to be a bad csb or do I need to replace the shaft due to bad u joints?

[reelizmpro]

Sounds like csb to me, especially since u said it was coming from the mid shaft area.

[jlevie]

Inspect the CSB to see if the rubber mount has failed. If so, the cause of that failure is almost always bad u-joints in drive shaft. In which case you replace both.