OK before everyone gets up me let me say at the outset, I have been listening to this whine in the gearbox for about 5 years and sometimes I actually enjoy it. I say to my self 'self, it is a reminder of the old 403 in overdrive". But Mrs Mac refuses to come with me in the old 404 anymore until I 'get rid of that bloody noise'.
This is the 404 that has the V6 in it.
What about putting some molleybond or some addative in it. What is it that causes this whine? Regards Graham