Sorry to be a pain and post another thread..

At about (and only at) 1100 RPM my car makes a vibration which you can hear more than feel. It gets worse under increasing load. I don't know whether this is coming from the engine/gearbox/driveshafts/clutch. I know it started after the harmonic balancer was replaced - is it possible the new one was installed incorrectly?... I know CVs can cause vibrations sometimes.. Someone even suggested it might be the thrust bearing :confused:

Would love to hear some thoughts on this... Seriously, anything at all.

Thanks.