I have been looking on the site for the past half hour and because NC is such a short search string I have had a hard time finding any info about the differences between the NB and NC 6-speeds. I imagine that the bellhousing is different between the two but is there any parts commonality between the two?

I know that the power capability of the NB transmission has been found to be somewhere in the realm of 350-400hp depending on driving style and use (road vs track). Have we found the limits of the NC trans yet if it is indeed different internally?

 

I believe the NC 6 speeds had some shifter fork problems that got covered under warranties. And I believe that the NC 6-speed is the asisn AZ6 like the miata and the rx8 6-speed with a different bell housing.

 

It took me 90 seconds on GIS to disprove this. NC 6-speed is a completely different box.

mx5cartalk.com • View topic - NC 6speed gearbox V Imported 5 speed

 

No mention of the NB in that thread. But it does look like a different tranny (and so does the s2000 tranny but thats also an asin az6). Which does not compute, the NC and RX8 share the same platform, and the rx does for sure run the asin, why wouldnt mazda just do another bell housing swap with a good tranny?

 

My employer blocks most google image hosting sites... <sigh>

 

You like my AZ6?

 

Mainly the reason I ask is that Zach Bowman of Road and Track (formerly of Autoblog and "Racing the Rock) is doing a build called "Project Ugly Horse" which puts a 2.0 ecoboost motor into a fox body mustang. He in a recent episode of "Autoblog Podcast" was thinking out loud about his transmission options. He was weighing a T5 with a special bellhousing or an NC Miata 6-speed. Based on the power goals and the recent transmission threads I was trying to help him by digging up a little bit of data regarding the longevity of the NC 6-speed in a 2800lb'ish 280hp Mustang. I was thinking that if the NC miata trans could survive the gearing might be better for this lightweight applicaiton.

So now you know why I ask.