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Old 08-28-2010, 09:25 PM   #1
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Speedo Gear ?

Hey Guys,
I'm normally a reader and not a poster on here but I know you guys have the answer I'm looking for. I recently changed my YJ diff ratios from 3.07's to 4.10s. At 55 mph it threw my speedo off 15 mph. 55=70 according to my GPS. I read your chart on here and it called for a 37 tooth gear (local jeep dealer didnt have a listing for a 37). Mine currently is a 30. A guy that calibrates speedos near me said that I need a 35. Now, I purchased a 39 at my Jeep dealer. Once I got it home i noticed the shaft was too short...It was a special order and they won't let me return it. Before I possibly waste another $92 I was wondering if anybody knew of a part # for the 35 spline with the long shaft ?
Thanks !

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Old 08-28-2010, 09:40 PM   #2
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not sure what part number you mean but maybe this helps?

Jeep Speedometer Gears at Morris 4x4 Center

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Old 08-28-2010, 09:43 PM   #3
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Old 08-29-2010, 07:03 AM   #4
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Thanks for the info ! Wow, the dealer really took me to the bank....
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92 YJ, 4.0, Stick, 3.5" Lift, R.R. S.Y.E. with a Adams Driveshaft, 31 BFG A/T, Tru Trac in the rear
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Old 08-29-2010, 10:00 AM   #5
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All obey the stealership
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Old 08-29-2010, 08:09 PM   #6
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Yeah no doubt....Thanks again. That link has all the info I needed and it only took a few seconds where as I spent nearly a week with them just to get the wrong part...
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Old 08-29-2010, 09:27 PM   #7
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no worries let us know how it turns out for ya

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