Noticed today my gearbox is making a slight metalic whiring noise in most gears ! you can hear it more when changing gear as you go through the neutrel bit to a gear doesnt matter if you go down or up the box its just noisy as you go from one gear to another and you can hear it more if you lift the gear stick gaitor out the way !!! also when cold 2nd gear is sometimes notchy . i changed oil last november to 75/90 and checked it and its fine . is my box on the way out and gonna go bang ?????????? (its a my94)