Driveshaft harmonics

[Sassy]

I still don't understand all this stuff but this link helps.
https://www.hotrodhotline.com/md/html/drive_shaft_harmonics.php

 

[ratrig]

Very good info. A great write up on troubleshooting vibration causes.
thanks for posting

 

[JohnnyBgood]

Yeah it’s a good post..went through all that stuff and issues when I put in the 4 link...