Aftermarket limited slip differential

[MikeMyer]

I looked around on the internet and this is kind of my last ditch effort. Is there any aftermarket LSD available for 2003/2004 M45? Mechanical, Torsen, viscous, anything will do.

[AZhitman]

What diff is in a Y34? If I know that part, I can get you an answer...

[MikeMyer]

I am pretty sure the stock diff is an open diff. I got stuck in the dirt once. Do not know the part number, though.

[AZhitman]

Right - I meant the designation (such as R200).

It looks like an open 3.92 R200. I would bet the J30 R200 VLSD would fit, and I suspect the newer M35 has a similar diff.

If you can get it on a lift and get some pics of it, it'd help. There's just not a lot of info out there on the Y34 M, even though it's one of my favorite automotive designs of all time - totally gorgeous.

Did you know Porsche collaborated with Nissan on the design?

[Tony Two-Tone]

I'm almost willing to bet the G's LSD would work.

[MikeMyer]

AZhitman and Tony Two Tone, thanks. I will try to get a pic. By the way, how do you upload pics here? It looks like you will need to have a web page to do it? Yes, I know Porsche and Nissan collaborated on the design.

[AZhitman]

how-to-post-pictures-using-photobucket-t521110.html

[EniGmA1987]

From my experience with them on a 2006 the M45 and M35 are quite different. The G's share a similar setup to the M35 in bolt patters and size. The M45 however is much larger unit, with larger bolts, and different bolt pattern. This is due to the 45 having larger axle's. I think I remember the end that connects to the driveshaft being slightly different as well.

It can be done using a G35 rear differential, but you also much replace your axle's with it to get the bolt pattern right. In addition to this, the axle's must have the proper spline count on the end so they fit properly. You may end up breaking an axle after a while though as you have a lot of power and would be moving to a smaller axle that isnt designed for the power it is getting.

[The00Dustin]

Ken in AZ changed to a G37 LSD diff before he had to sell his car. Here is one post on the topic.
g37s-diff-comparo-for-m45-pics-t464801.html
There may be more (from him specifically, I don't remember as it was a while back), so search.


EDIT: This link and everything I have seen is for a 2006, hopefully AZHitman is more help.

[MikeMyer]

OK, I got some pics and hope it works.

[bbs350z]

thats diff looks very similar to the z/g diff. id do some research. you may have to swap out axle stubs, but even so its worth it because 3.5/3.3 vlsd diffs are right around $300 complete

[MikeMyer]

OK, thanks bbs360Z!

[AZhitman]

GAWD that's a sexy beast.

I love the 03-04 M45 soooo much.