Figuring out Speedo gear - Great Lakes XJ

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Topic: Figuring out Speedo gear

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xjryder

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Posts: 470

Date: Oct 2, 2008

Figuring out Speedo gear	Permalink

today i found out that at 65mph I am doing 72.9 mph the ST made sure to let me know its the drivers responsiblity Blah Blah anyway there was a thread about installing new speedo gear but my question is how does a person figure out which new gear he needs? Adam? I have a stock 8.25 rear axle, running a 33x9.5 tire on a stock rim. 98 XJ I know the more teeth the slower the gear will turn. -- Edited by xjryder at 10:42, 2008-10-02 __________________ To build something that can run over the idiot driving 45 in the passing lane ,Now Thats Talent!

LEAD_NOT_FOLLOW

GLXJ PRESIDENT

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Posts: 3934

Date: Oct 2, 2008

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3.55 gears with 33" tires you need a 31 tooth speedo gear. __________________ '93 XJ Cherokee Sport - build thread '89 XJ Cherokee Laredo - build thread '88 MJ Comanche Pioneer SWB - build thread '87 MJ Comanche LWB '94 YJ Wrangler - build thread

aci4369

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Posts: 3094

Date: Oct 2, 2008

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The chart that I always used says that for a 33" tire with 3.55 or 3.73 gearing to use a gear with 31 teeth. If you have 4.10 gearing to use a gear with 36 teeth. __________________ '99 XJ, 5.5" lift, 33" MT's '11 Dodge Charger I miss the days that they made toys that could kill a kid. Support our Troops My Pics and Specs My Build Thread

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