Just wondering if anyone happens to know if a G37 LSD will fit onto the G25? Or if it does will my final drive ratio be screwed up?

 

A diff swap will work and will change your rear ratio. It will benefit the 25 tremendously but it might mess with your cruise control.

 

If you're swapping the diff from a RWD G37S 7AT Sedan, the final drive ratio will be the same at 3.357:1, however only the RWD Sport Package had VSLD, whereas the RWD non-Sport did not.

If you're swapping the diff from the 6MT (or the 2008 G37 Coupe RWD 5AT), the final drive will be shorter at 3.692:1.

If you're swapping the diff from the Vert 6MT, you'll have even shorter rear gears (3.916:1), but no VLSD regardless of sport package. Never understood why that is, but it is what it is.

MPH was unaffected when I went with 4.083 rear gears on my 6MT.

Fitment? Can you actually do it? Probably, but I don't know. Here are specs on the G25: https://www.infinitihelp.com/models/...ifications.php