i used the same system for a cefiro with a 25 box worked perfectly, i used the navara speedo drive (32702-02G17) nissan part no. burnt the cog off, used the red gear on the speedo drive out of the r33 box. rounded out the middle of the cog, heated up the navara drive and tapped it on, super glued both ends. cut the slot for the locator and all good.
cheers heaps