I have a 1976 280z manual trans, does anybody know if it has a R200 or R180 diff?
Limey.

 

As far as I know the R200 came with the optional 5 speed in '77-'78.

 

http://www.geocities.com/inlinestroker/ratio.html

 

That's great info except I own a '77 with 4 speed R180 and a '77 with 5 speed and R200. One thing I've learned is you can't be sure all info in the books or on the web is correct.
Another error is the '82 2+2 had the close ratio 5 speed and 3.9 R200. I looked for one quite a while because I read that '81-'82 2+2 was the only model that had that set up. I'm sure because I pulled them myself but first checked to see that the speedo gear was color code black. It's not a fluke because the local picknpull has another one. I've never seen a '75 or '76 with a R200 but I certainly could be wrong on that.