Yes. I have a vibration at 80 kms (50 mph) and beyond. It's not severe, but it's there and I'd like to fix it.
Initially, I went to a garage to find out about the double clunk when excellerating from a stop, and the single clunk when coming to a stop. They weren't able to figure out what was causing the clunk (later, by way of reading some posts on forums, I realized the clunk was due to the slip yoke needing to be re-greased), but, while I was there, they pointed out to me that there's a single 'clank' in my drive shaft.
They had it up on a hoist and had it in Drive with someone inside excellerating and decellerating. Using a headset and microphone, you could hear a distinct, single 'clank' each time upon excelleration and, again, upon decelleration. They said there's something broken inside my drive shaft. They weren't trying to sell me a drive shaft. In fact, they recommended a couple of auto wreckers to pick up another drive shaft, and, they said that the job wasn't to difficult and I could, probably, do it, myself.
Just wanted to get further info on whether, in fact, there is components inside the drive shaft that could break free causing the 'clank' and an imbalance leading to the vibration.
Before learning about re-greasing the slip yoke to get rid of the double clunk, I took the drive shaft out to see if I could determine if, in fact, something was loose inside. Couldn't determine anything, so I put the drive shaft back in. I checked the universal joints and they were in good condition - snug, but moving freely and smoothly. Vibration is still noticable...in the seat and the steering wheel.
P.S. As a result of hammering the flange to unstick them from each other, I guess the vibration of that was enough to free up the slip yoke. Once the drive shaft was back in, I didn't have the double clunk, but I know I need to take the shaft out, again, to properly re-grease the slip yoke.
Welcome Visitor! Please take a few seconds and 
