diff question

[WH173VP]

is it normal for my VP berlina to have a rubber plug in the diff where i fill it up from because its leaking slightly and my last commodore had a bolt not a rubber cap

thanks in advance

[madsav]

Yep its normale mate, some commys ive noticed has a rubber plug other have a bolt not sure as to why but if its leakign abit just change fluid and gasket and it should be ok

[WH173VP]

ok mate how much will a gasket cost roughly