i have got a 250bhp astra turbo running an F20 box with a qualfie ATB differential. I have noticed that the gear change is a bit sloppy and it whines a bit in 2nd and 3rd so i would expect a new box will be needed soon.
now i have a few questions:
1) are F20's normally alright to take 250bhp?
2) are cally 6 speed boxes a lot stronger than F20's?
3)would my differential from F20 fit the 6 speed box?
4)how hard are the qualfie differentials to change?
5)how hard is to change the 6 speed box to 2wd?
6)how much would you expect to pay for a 6 speed box?