Hi just brought a diff of Andyz,aparantly from a twin turbo jap z auto for my uk twin turbo auto car, for a replacement for my blown one.The axels look the same apart from two things first there is no oil cooler takeoffs on the replacement jap one,and there are not the same number of teeth on the crown wheels so there for the ratios are compeatly different, why is this guys thanks.Chas

Well I do know for a fact that the Jap diffs have no oil cooler, where the UK & Euro diffs do (it was called the "Autobahn package" I believe, due to the sustained high speeds overe here compared to in Japan)

 

I wasn't aware that the Jap & Euro diffs had a different ratio though, only manual & auto, and NA vs TT. But - if you're looking at it - I guess they must?

There are a number of subtle differences between the UK and Jap models, that mainly seem to be centered around improving performance below the self imposed Japanese speed limit. Maybe this is one of them.

Charlie

Considering how you toasted it in the first place you might need the Europe double oil cooler version!!!