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Old 02-20-2013, 06:15 PM   #1
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help with my speedometer gear

hello can someone help me? i have a jeep wrangler tj 97 and i change the transfer case and after that the speedometer its not working anymore, and i need to know how to get the right speedometer gear! thanks!!

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Old 02-20-2013, 07:33 PM   #2
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Did you align the speedo gear mark to the correct tooth number of the gear marked on the transfer case when you installed it? If not, it's not going to work.

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Old 02-20-2013, 07:40 PM   #3
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Here's a quick link for changing the speedometer together with a chart to show what speedometer gear tooth count for different tire and axle ratio combinations. http://www.4x4xplor.com/speedo.html

The usual cause however for an inoperative speedometer after reinstalling the speedometer gear housing is the speedometer gear is not engaging the pinion gear underneath inside the transfer case. The reason for that being that the housing was not rotated to the right position, or was not rotated far enough, so the gears mesh together properly. So your fix is very likely that you just need to rotate the gear housing a tad more so the speedometer gear engages its pinion gear underneath.
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Old 02-20-2013, 07:51 PM   #4
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Thanks Jerry, I was looking for a better expanation than the one I gave when you posted.
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Old 02-20-2013, 07:59 PM   #5
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Yeah, make sure the notches line up. If you twist the connector around there will be another set of numbers. Make sure your speedo gear falls in between the numbers facing you as you install it. Didn't know that and it wouldn't work until I flipped it around and saw more #s on the other side.
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Old 02-20-2013, 08:24 PM   #6
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i did everything but i dont know the ratio because there is no tag in it!
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Old 02-20-2013, 08:38 PM   #7
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the transfer case that i buy didnt fit in the drive shaft so what i did is use everything from the inside of the old one and just use the new shell and after that the speedometer wasnt working and i put everything back as your guys said, but still not working
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Old 02-20-2013, 08:43 PM   #8
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Is the plastic drive gear sleeve on the output shaft which is used to drive the speedometer gear? You can see it inside the transfer case with a flashlight shined through the hole in the t-case that the speedometer gear housing fits into. The speedometer gear meshes with that big plastic gear to drive the speedometer.

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Old 02-20-2013, 09:28 PM   #9
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the blue piece its exactly like in the picture
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Old 02-20-2013, 09:48 PM   #10
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There's only 4 positions the speedo gear housing can be re-installed.
And the speedo should only work in the one (correct) position.
The number of teeth is embossed on the speedo gear - if you can't read it, try each of the 4 positions.
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Old 02-20-2013, 09:59 PM   #11
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i tried already, the factory speedometer gear say 29 teeth and i think i need another one with more teeths or biger or large, i dont know nothing about jeeps i just get it a few months ago!!

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