Originally Posted by
chaffe
always, always go mtx75 mate, longer gears and way way stronger than an ib5, plus you can get a diff from the states (helical) for around 430 quid delivered, and fit it yourself very easily. All the bits are availible for the focus for this box, so go for it!
I'm aware of the weaknesses of the IB5, I regularly try to convert people across to the MTX-75 for turbo conversions because of it.
But my gearbox has been (badly) rebuilt with stronger bearings and other components by Competition Tranmission Specialists (wankers
) so I'm happy it could cope with the power/torque I'd be looking to put through it.
IB5 is such a nicer shift too as it doesn't have double synchromesh.
It's not proper serious motorsport, more grass roots sprinting so I suspect I wont be able to get the best out of a plated LSD, certainly not my money's worth.
I'd completely forgotten about checking what's available in the States for the Focus!!!