Righty-ho,
Just want to double check something, if you could have a look at the following pic:
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I've circled drain plug in the pic, but ignore that :-)The 2 plugs/nuts that are circled together - which is the fill hole? I'm certain it's the bigger of the 2, but what has thrown me is that when I got new washers for the fill & drain plugs - I was given 2 different sized washers and was told the bigger of the washers was for the drain plug (the drain plug seems the same size as the bigger of the 2 plugs circled together).
Also, the (smaller) washer I was given for the fill plug is too big for the smaller of the 2 plug.
Thanks in advance.
PS. It's a Mazda gearbox.