So my current gearbox for my golf is a standard type 084 4 speed and its on its last legs. I am wanting to convert it to a 5 speed and have read that it is pretty easily done with a 1.4 mk3 golf trans. However does the swap need to be to a type 085 5 speed or can I put in a type 02k 5 speed CZA code. If anyone could help me out a bit that would be great, still kinda new to this. And if anyone knows of any 085 gearboxs for sale that would be great too!