I have an 00 BB with 106k. Clutch was replace about 10k miles ago.
Under moderate to hard acceleration in gears 4-6 there is a pronounced vibration that I can feel in my feet and seat. Doesn't seem to correlate with engine speed, and does not occur even under very hard acceleration in gears 1-3.
I was thinking CV cups, but would that only happen in higher gears? I guess it could also be a slipping clutch, but even under hard launch there is no slipping whatsoever.
Motor/trans mounts would be the other suspect, but again, no vibration unless I hit the gas fairly hard in 4-6, and the vibration starts immediately, and so I don't suspect a tire balance issue.
This started out as barely noticable and has gotten progressively worse over the last 6 months.
Any suggestions appreciated.
Edit: the other day I had to adjust my clutch pedal as the engagement point ended up at the floor after teaching my daughter to drive MT . Currently the engagement is a bit too high. Vibration was noticible before that though.

 

Is it an OEM clutch disc or an aftermarket one?

Thanks!

 

Aftermarket. It has been a bit, but I think it was an Exedy.

 

This is prolly not a good thing.

Sorry.

 

Get 2 piece axle spacers.

Put one on the drivers side only. See if the problem disappears.

 

Thanks for the reply. Something along these lines?
ScienceofSpeed Axle Spacer Set

 

Exactly.

I have seen countless pitted buckets over the last 20 years.

100% of them were on the driver’s side (left)

 

I swapped my driver and passenger CV buckets the other day and no more vibrations on acceleration. And yes like Billman said, the driver side bucket did have some pitting

 

Thanks for the update!

Good driving!