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Old 01-26-2011, 02:57 PM   #1
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Hello! New to site, new Wrangler, new question

Hello everyone!
Well, last week I purchased a 99 Wrangler 2.5l 5 speed manual soft top and I am pretty excited about it. I used to have one several years ago, but at that time I had a 1 hour commute to work and the gas mileage about killed me. So now I live in the same town that I work in and thought it was time for a TJ again.
Great body condition, fresh looking paint, and interior is perfect. Has after market fog lights and it came with a soundbar. 73,000 miles and I gave $6000 for it.
So here is my question. I just put 31" tires on it yesterday from stock and my speedometer is about 5-6 mph slower than reality (verified with gps). I called the dealership and they said that they probably weren't going to be able to calibrate it because the speed sensor was in with the ABS module.
This is where I'm confused. I thought that I needed to put new speedo gears in it to get it closer?
Who's right? and if it is me that is, why did the Jeep dealership tell me this other thing?
Thanks!
Chris

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Old 01-26-2011, 03:25 PM   #2
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Your right. You just need a new speedo gear

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Old 01-26-2011, 03:33 PM   #3
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just learn to live with the small speedo error, thats what I do.
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Old 01-26-2011, 03:37 PM   #4
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Speedo gear will do the trick, but if you change your gearing someday or put even bigger tires on it, you'll have to change it again. You can try getting one of these

Superlift Suspension 33002 - Superlift TruSpeed Speedometer Recalibration for 92-02 Jeep® Wrangler YJ & TJ with Over Size Tires - Quadratec

It costs quite a bit more than the speedo gear but it is another option.
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Old 01-26-2011, 03:43 PM   #5
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And if you got such good advice from that stealership I'd stay far far away from them when ever you need any type of repairs!
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Old 01-26-2011, 03:46 PM   #6
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No doubt. I kind of got the impression that I was an inconvenience to them and they just wanted me off the phone. When I brought up the speedo gear thing to them they were like "uh......yeah.........I don't think it has that....."
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Old 01-26-2011, 03:47 PM   #7
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Here you go

Changing Your Jeep Speedometer Gear

It even has the chart to tell you which gear you need
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Old 01-26-2011, 04:16 PM   #8
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I would just change the speedometer gear. I just did mine with Jerry's help and the speed is dead on with gps.

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