Some weird vibrating that needs to be fixed!

Just took the car around the block for the first time all summer... I noticed a vibrating above 35 mph that may or may not be the driveshaft (this is my first guess) My question is, are driveshafts weighted for particular cars? I noticed a block that look like a weight near the universal. Just wondering if they typically need to be re-weighted or anything when you swap them out.

Author: admin