Marc280 Posted July 30, 2005 Share Posted July 30, 2005 Hey everyone, I've eventually got around to swapping the pinion gear for the speedo after converting my 81zx from auto to manual but now the speedo won't read at all. The gearbox i put in had a red 20 tooth pinion which i have now swapped for a black 17 tooth pinion. I noticed that the black pinion has a smaller diameter than the 20 tooth which i guess would be expected. Should you be able to just take the 20 tooth out and put the 17 in or is there more adjustment needed? Thanks. Quote Link to comment Share on other sites More sharing options...
VinhZXT Posted August 3, 2005 Share Posted August 3, 2005 The cog doesn't mate with the drive gear inside the trans. You need to remove the locking nut and rotate the speedo cog housing until it mate with the drive gear. If it mate properly when you spin the tires you can see the center shaft spinning. Put a mark on the speedo housing where the locking tab will be and cut a new slot for it. Good luck Quote Link to comment Share on other sites More sharing options...
Marc280 Posted August 7, 2005 Author Share Posted August 7, 2005 thanks for the reply, i'll try what you've suggested and see if i can finally get it reading correctly Quote Link to comment Share on other sites More sharing options...
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