how much would you expect to pay for a complete r31 diff? they are lsd right? is it the same diff in all the cars silohette, executive etc or do i need to be looking for a particular model??

cheers

only the silohette has the lsd.

Skyline:

Manual (lsd and open) : 3.7

Automatic (lsd and open) :3.89

Pintara (not sure on manual) : 4.11

GTS2 (both auto and manual) : 3.89

Pretty much everything you need to know is here:
R31 skyline club - tech info

thanks for the info and the link!

pintara was only 25spline I think, skyline was 28spline.

I reckon $200 max for a basic skyline diff, more for a sillouette diff if the LSD is good

I think the pintara was a 28 spline too..totally over spec'ed. I was surprised when I heard about it too.

is it an expensive exercise to get one of these r31diffs cut down to a 1200 ute?

Pintaras are usually 4.11 and are 25 spline. Skylines are 28. I learnt the hard way by getting a pintara instead of skyline, lucky it was free.

Depends who you know, to how much it will cost. And it also depends if you want open wheel, LSD or spool etc.

whats better for street use? i heard that locker diffs are usually reserved for track use? im probably wrong

LSD is by far the best for street
spools are just the cheaper way of going about it

what type of lsd is the silohette one? and is there an aftermarket one you can buy? i assume by spool you are talking about mini-spools?