**** my diff centre last night down at largs bay my friend got a 28 spline r31 diff i was told the centres are interchangble my diff is a vl v8 4 pinion non lsd ineed to no if i need the little gear driven by the crown wheel or just the centre that comes out as one peice.

well what part did you f#$k, the gears or the center or the spider gears? the center is interchangable, its not always a straight forward swap though