Swapped Ring&Pinion - Speedo needs adjusting

[EricB]

I took out my 3.36 over the weekend to temporarily put in a 4.11 while I finish rebuilding my 4.40. Obviously the speedo which was suprisingly accurate is no way off. I know I can get an adapter gear to screw on the tranny where the speedo cable plugs in.

But where do I get this? Don't have Motorsport's catalog in front of me but do they have that too???

-e

[2ManyZs]

If MSA doesn't have the right drive gear, you could try Courtesy Nissan, seems like they should have one, or at least be able to get one.

Red, 20 tooth for the 4.11

Purple 21 tooth for the 4.38

[EricB]

Courtesy Nissan ... in Alhambra, CA? That's the one I know by that name.

Somehow I think yours is a different one.... confirm?

Thanks,

-e

[civ104]

Courtesy Nissan is in the Dallas-Fort Worth area in Texas. You can find them at http://coutesynissan.com http://coutesynissan.com Go to parts, and type in your request. Very good. Very professional; and probably have the largest stock of original Z parts in the country, if not the world.

[EricB]

ooohh i see....

fyi i checked prices on some of my favorite items between courtesy in tx and www.nismoparts.com which is a nissan dealership in seattle and everything except for the oil cooler that comes with the diff cooling kit was cheaper in seattle.

thanks for the info nonetheless!

-e

[byunique]

How difficult is it to swap a ring and pinion in a R-200? I wanted to change my 3.90 to something like a 4.44. I know 4.11 is available in a 200sx turbo, but I wanted to go higher.

Motorsport does have the speedo correction gears BTW, they are about $15...

[2ManyZs]

Well, Jeff Werth told me after changing the ring and pinion in mine that he would rather do 10 R-180 swaps than to do another R-200. The R-200 uses shims to set the pinion depth and it's a long drawn out process to get it right.

[byunique]

Boy, that sure scares me away from doing it!

[2ManyZs]

It did me too, that's why I had someone that knew what they were doing set mine up. Good luck finding a lower gear than 4:11 for an R-200, they are getting hard to find.

There is an alternative, an R-180 out of a 720 4x4 pickup will have a 4.37:1 diff in the front. The years are 6/79 through 12/82.

And the 720 longbed 4x4 from 6/79 through 6/80 had an R-180 with a 4.62:1 diff in the front. Of course they may be a little hard to find in a junkyard, but they will be cheaper and lighter than the R-200.