2.0 S16 gearbox filler/drain gasket sizes

[bpfh]

Hi Everyone,

A quick question, going to change my gearbox oil this afternoon. After checking out the manual (French RTA), plus an internet search, there is loads of info available about what to do and how to do it, and they all say, with reason, that you need to change the drain & filler gaskets, but I have only found one site that just mentions that the gearbox drain plug is the same size as the engine oil drain - so 16mm, but nothing on the filler.

As that filler bolt is smaller (19 vs 21 mm from what I have read before going under the car), would it use a smaller gasket? Logic would say 14mm for the smaller bolt. Any pointers on what to get ?

Cheers,
Daniel

(Edited to clarify the title)

[Capncol]

Manual or auto?
Reads like it's a manual in which case drain plug is a taper so just use thread sealer, an I fill through the breather hole using a funnel. Much less mess.

[GrandadMonkey]

It's a 2.0 litre - so it'll be a manual box.