how far off is my speedometer and how hard is to fix it

hey whats up,
i was just wondering how far off my speedometer was, i have a 89 with 33s and haven done anything to fix it, and how hard is it to replace the tooth i beleive its called, so it correct again,
thanks
jimmy

jimmy forbes said:

hey whats up,
i was just wondering how far off my speedometer was, i have a 89 with 33s and haven done anything to fix it, and how hard is it to replace the tooth i beleive its called, so it correct again,
thanks
jimmy

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Go here: http://www.go.jeep-xj.info/HowtoSpeedoGears.htm
The chart on this site is the most accurate of the bunch. You need to know what your axle gear ratio is (for all 4.0L engines: 3.07 if 5-speed tranny, 3.55 if auto). I believe most 4 cyl engine equipped XJs have 4.10 gears and some with 3.73, but Eagle can correct me if I'm wrong.

The speedo gear is easy to change. It's in the transfer case and has a wire running to it. Speedo gears can be bought from a Jeep dealership. And don't let them tell you to get a tooth count that's different from the chart on the web site I provided. I had several people/shops tell me to get one that was WAY off, basing their recommendation off of inaccurate charts.

Tom

i went off a chart simalar to this one and it was right on the money. i have 33 tires and 4.56's so i got a 39 tooth speedogear

moneypitxj said:

i went off a chart simalar to this one and it was right on the money. i have 33 tires and 4.56's so i got a 39 tooth speedogear

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money pit; what year and trans do you have. If yours matches mine, I will get the 39 tooth gear. The link to that site looks good but I am having difficulty following it!

Wolz, he year and tranny don't matter. If you've got the same gears and tires that's the speedo gear you need.

O.K. I wasn't sure if the tranny had anything to do with it. I did some searching and it looks like i need a 38 or a 39 tooth gear. thanks