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Speedometer won't work


txpath4x4
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Sounds like the trans isn't turning the speed sensor. If the old pinion was trashed, maybe the gear it engaged was also trashed? Or if you changed sizes, maybe the gear just isn't touching the gear in the trans for want of a spacer or whatever Nissan used to accommodate the different speed sensor gear sizes. :shrug:

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it worked, but i went from the original 235 tires to 31's, and wanted a true speedometer reading. when i put the new one in it wouldn't work. i have pulled it out and hand spun it. it registered on the dial..been working a lot so i haven't been able to pull it again to check dimensions

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Ah, makes sense then. The gear for 31s has to spin faster than the 235 one (relative to the transmission) to account for the larger tires. This means it's a smaller gear, apparently enough smaller that it doesn't touch the gear in the trans. I don't know if there's a shim or an adjustment or what there is, I know this has been done so hopefully someone knows.

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