Join Date: Jul 2011
Location: Cologne, Germany
Worth checking if the engine mounts are worn. Worn engine mounts allow too much twist and the breathers on top of the transmission can knock against the steel cover over the shifter tunnel...and usually you find the 3 rubber bellows on top are torn to bits. (you need to take out the centre console to inspect these, not a bad job to do)
Had a similar sounding problem, changed mounts and problem was gone.
Dom - Alfa Spider 1990 S4 - formerly: Alfa 101 Sprint, 2600 Sprint, Montreal - family classics: Jensen Interceptor II, '58 Hooper RR Silver Cloud I, Shadow II, '60 Corvette.