konect

It is in a 1990 Cefiro with RB20DET It is really noticable when changing gears from take off. Ie reving up then 1st > 2nd then reving up again. When I depress the clutch it vibrates A LOT and then subsides once I release the clutch, (although I can still feel it in the stick) Its not wheel alginment as it just had on done and the vibration goes away after about 15mins

Since last thursday I have had a nasty vibration coming from somewhere in the driveline. Had a mechanic drive it yesterday and they said that the baffle on the front muffler has collapsed. However, I rang the exhaust place and they said it wouldnt cause the clutch / gearbox to shake as it does. The other strange thing is that it only happens for about 15mins and then goes away. Anyone has the same problem ? HOW did you fix it ?