Have you managed to get any further with this? out of interest do you have any problems with selecting gears, I have a very sloppy gear stick which I believe is the warn bush in the base of the gear lever but I have also had trouble with selecting 2nd, 4th and especially reverse, although I have now found that the main gear selector cable has frayed just above the gear box.
I have managed to get hold of a good set of second hand linkage cables complete with gear lever (from AutoLusso) and also planning on changing the bush mentioned above. I am hopping that this will solve my gear changing issues but as with all Alfa's I am expecting a large bite on the backside.
Gone but not forgotten: 156 2.4JTD - 156 1.8TS - GT 2.0 JTS
What is understood does not need to be discussed