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Join Date: Feb 2008
Location: United Kingdom
Re: 156 TSpark 1.8 gearbox noise
the drain plug is between the gearbox and subframe on the left hand side, awkward to get on but obvious as it has the hex hole in it to loosen it, you should expect 1.5 litres from there, as the diff keeps 0.5l, also check that plug for debris, it's magnetic so you get the fir tree on it, but there is a mag pad inside the box too hich you can only get to on a full strip and that normally catches the big stuff. To fill it the hex plug is next to the reverse light swith on the front, if the box is completely empty then you'll get 2l os 75.90 GL5 spec oil into there and that should quieten things up.
BUT before you do all that, inspect the clutch to ensure it's dry and remove the 2 8mm bolts from the flywheel dirt guard and make sure there's no fluid in there. If the bell housing is wet then the box will need to come off to check the mainshaft bearing and seal.