Drive shaft vibrations?

There are a couple things that cause vibrations in drive shafts. First and foremost are u -joint issues.

When these get worn out they allow the drive shaft to move around and can actually bind to prevent it from spinning smoothly.

Here are a couple guides that talk about this:

https://www.2carpros.com/articles/how-u-joints-work

https://www.2carpros.com/articles/how-to-remove-a-drive-shaft

If the u joints are tight then the driveshaft needs to be balanced.

You can try to do this by trial and error and that is to use some hose clamps and strap about an ounce of weight using tire weights to the driveshaft by the differential. Then you can spin that weight around the drive shaft to the point the vibration is the least.

Clearly this way can be time consuming and not even result in a fix because it is an assumption that the balance is off. The best way to have this done is to go to a drive shaft shop and they will use a tool that can balance it properly. If this is balanced and the u joints are good then the drive shaft is not the issue.

The last think you can try and cleaning both side of the flanges and then index the shaft by turning it and bolting it in different places to see where the drive shaft vibrates the less.

Please run through all this info and let us know what other questions you have.

Thanks