Thanks for your input mate wot is a ford mt75 gearbox has a visgos witch will help with the mis match I think the ford box runs at about 60/40 split but I'm told today at a place that dose skylines that there 50/50 split . and if I run 50/50 spilt on the track it could weld the clutch in the transfer box as the diffs could be working against each uver . But they did say if I run it like 70/30 and run a oil cooler it should be ok