My TJ speedometer just started acting up... works good to about 40 mph, then it just bounces plus/minus 5 mph and never goes over 45-50 when I know I'm doing 70. I put a new gear in about 1 year ago to correct for tires/gears.
TJ speedometer
Jun 02, 2006
5 Replies
The speedometer gear housing was probably not rotated enough to get the speedometer gear to mesh completely with the pinion gear that drives it. I'd pull the gear to check its condition and if it's ok, reinstall it and make sure to rotate the housing so the gear is fully engaged. Be sure to match the speedo gear's tooth count with the index mark on the housing.
Jerry
JimG wrote:
You failed to mesh the teeth on the gears correctly (fully). Now, the teeth are showing signes of being stripped. You _might_ be able to save the gears by crawling back under your TJ and adjusting the mesh again.
If you had a speedo cable, I would say you are describing a broken one. The broken ends will hold together up to X mph then torque overpowers the frayed cable ends and they slip....
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail >TJ's use a speedo gear driving an electronic sender, not a mechanical cable.
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