what nissan vehicle can i pull gears out of that will work with my 03 base
350z i am looking for 3.90 what vehicle or what nissan part number need some imput

 

xterra, dont know what xterra stock ratio is, but they fit

 

Frontier is 4.08.

Newer MT 350z or G35 have 3.7 in them, so if you have a 03 automatic, then it's a pretty good upgrade.

 

All MT 350Z's have 3.538 FD. The 2008 (and maybe 2007?) G35's do have a 3.69 in them, though.

 

You are correct, only the new G35s have the 3.7 FD. I keep thinking otherwise since it's such a good upgrade for this platform.

OP, what you can do to save some money is buy a used diff housing in the marketplace. It's going to be much cheaper then putting new gear into yours. It's not exactly the ratio you are looking for but it's a thought. It cost me around $550 in labor to replace and install new gears, a used one sometimes run for only a few hundred bucks and is quite easy to replace.