Anyone else experiencing a really sharp vibration when shifting from 4th to 5th gear under hard acceleration at high RPMs? I couldn't really fit this experience into the descriptions of transmission problems on here.

The vibration happens while the clutch is fully depressed as I shift into gear and seems to damp out when I release the clutch.

Don't know what to make of it. It's not grinding gears or anything, and it doesn't seem to be hurting much, but it's interesting to me that it only happens when shifting from 4th to 5th...

-- Mark