I think sothere's no interval for it in my service book, and it's not something that you usually change at all frequently
i'd defo change it if it's done 250K Kms though. are you on the original box?
I think so :clown:156250 miles, is that a club record?
quite possibly, the seller didn't tell me anything about changing the gearboxsurely not on the original gearbox @ 250,000km!
mine lasted untill 38 lol