BeeJJ i am in brisbane at the moment and weekend1000 has mentioned he has a 5 speed spare at what seems like a reasonable but i decided i will have to do something with the diff because its just about gone anyway its making horrible grinding noises. I figure this new 4 speed is doing fine so i may as put the money into something that really needs attention.
Thanks for the tip though i will probly give the G70 ago ide like this gbox to last as long as possible.

Thanks ddgonzal atleast i know where and what im looking for now so i can id what gbox i have.