I was looking into a 6speed swap a little while ago and from what I can tell you so far is that you will need a 6 speed. I talk to a guy who races a juke and he turned me to a campany (wavetech, if i spelled it right lol) that actual has upgrades for these and they said it needs a 6speed to fit properly for any of these lsd. The spline count if I recall is the same. But with add a 6speed seams like it may fit but that I cant confirm. I am waiting for the warrenty to end be for a major changes are done.