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Old 07-28-2010, 01:38 PM   #1
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Speedo Calibration and ...

Ok I just came back from the Jeep Stealership to have my jeep calibrated. But it doesn't look like anything has change. It is still off like it was before. Nothing has improved wtf?? Now my question is when you have ur vehicle calibrated is it suppose to get u right on or get you close to your actual speed? I feel like my $100 went to waste and that I should get a refund for it.

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Old 07-28-2010, 01:45 PM   #2
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Did you run with a GPS to verify that it's off? If so take it back and show them. But it will not likely be dead on, they are more a "suggestion" than carved in stone. It should be right in the neighborhood tho, if you paid them to calibrate it... Make 'em do it over..

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Old 07-28-2010, 01:46 PM   #3
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you can't "calibrate" the speedo. You have to replace the speedo gear in order for it to be correct. atleast thats what i thought.
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Old 07-28-2010, 01:54 PM   #4
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Did you run with a GPS to verify that it's off? If so take it back and show them. But it will not likely be dead on, they are more a "suggestion" than carved in stone. It should be right in the neighborhood tho, if you paid them to calibrate it... Make 'em do it over..
Yup I sure did...It is still off like it was before
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Old 07-28-2010, 01:58 PM   #5
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Originally Posted by pakman55 View Post
you can't "calibrate" the speedo. You have to replace the speedo gear in order for it to be correct. atleast thats what i thought.
Can someone confirm this
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Old 07-28-2010, 02:00 PM   #6
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She has a Rubi, Pakman, they don't have a speedo gear...
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Old 07-28-2010, 02:00 PM   #7
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Ohhhhhhhh. I'm sorry RUBIChick. I'd do what inferno said then.
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Old 07-28-2010, 02:05 PM   #8
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I believe that you need the either the Speedo gear or TruSpeed or Accuspeed that get's wired in.

Another one is the Dakota Digital SGI-5speedo calibrator

http://skinnypedal.net/store/index.p...&products_id=5
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Old 07-28-2010, 02:07 PM   #9
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Okay so let me get this straight even if I take it to the dealership it still won't fix the problem??
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Old 07-28-2010, 02:11 PM   #10
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I was going 40mph but GPS says 44mph .... 50mph GPS says 56mph 65mph GPS says 75mph
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Old 07-28-2010, 02:12 PM   #11
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Im no where near close this is unacceptable. Going back to the dealership... very heated and pissssedddd
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Old 07-28-2010, 02:15 PM   #12
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Tell them it's not correct and/or next time take for test drive before paying for work.

Since they sound like idiots why waste the money, buy one of the Calibraters that I listed and be done with it. They will have to be wired in though.
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Old 07-28-2010, 02:24 PM   #13
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I'm obviously not that familiar with the TJ, but a quick Google search found this: Jeep Wrangler Speedometer Gear FixThe bottom picture is obviously a TJ dash. So it looks like a combination of a gear change and calibration is necessary.
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Old 07-28-2010, 02:39 PM   #14
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Looks like this maybe your best choice. Superlift TruSpeed
I'd take it back to the dealer, get your money back (good luck with that) and buy one of those, or just add... I've been doing it for years...
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Old 07-28-2010, 02:42 PM   #15
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That looks like a winner InfernoGirl. As usual your advice is spot on. Why haven't they made you a mod yet? The OP might want to consider asking the dealer for a refund.
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Old 07-28-2010, 02:47 PM   #16
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That's what I posted above.... lol

The Superlift one is more expensive, but research the ones listed on their sites to see what the functions and capabilities are for them.

The one from the Skinnypedal link is only $110
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Old 07-28-2010, 03:00 PM   #17
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I'm at the dealership right now they said they are going to try again this time set as manual not automatic lol alright we will see ... if it doesn't work they better give me a refund or hell will break loose...trust
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Old 07-28-2010, 03:11 PM   #18
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Negitive....she has a 06 rubicon...has to be recalibrated...computer. No speedo gear...they use a tone ring.

couple ways to recalibrate it.

take it to dealer...and hope they do it right.
get a module...such as the superlift tru-speed product or other like product and you can set it how you want and correct it if needed for other mods/tire sizes.
This was a reply in your first thread regarding the speedo being off.
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Old 07-28-2010, 03:38 PM   #19
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getting a refund!!!
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Old 07-28-2010, 04:33 PM   #20
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My question for the dealer is once they recalibrated the cluster, did they then disconnect and reconnect the battery? According to Chrysler Techline you have to.

Vehicle Issue How is pinion factor set on a Jeep Rubicon Wrangler ?;Vehicle is a TJ Jeep Wrangler Rubicon. Vehicle is not a base TJ Jeep Wrangler

System or Component Inaccurate,Reads High,Reads Low;Customer Concern (No DTCs);Speedometer;Yes - Continuously

Recommendation Pinion factor is changed in the cluster - once complete the battery should be disconnected and reconnected. DRB software must be at 62.3 or higher.
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Old 07-28-2010, 05:11 PM   #21
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My question for the dealer is once they recalibrated the cluster, did they then disconnect and reconnect the battery? According to Chrysler Techline you have to.

Vehicle Issue How is pinion factor set on a Jeep Rubicon Wrangler ?;Vehicle is a TJ Jeep Wrangler Rubicon. Vehicle is not a base TJ Jeep Wrangler

System or Component Inaccurate,Reads High,Reads Low;Customer Concern (No DTCs);Speedometer;Yes - Continuously

Recommendation Pinion factor is changed in the cluster - once complete the battery should be disconnected and reconnected. DRB software must be at 62.3 or higher.
I saw the 2nd dealership do it and no they didnt disconnect the battery.
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Old 07-28-2010, 08:19 PM   #22
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I took it to a 2nd dealership and supposedly they calibrated the speedo and still is off. I guess speedo calibration for an 06 rubi doesn't work.
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Old 07-28-2010, 08:31 PM   #23
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Old 07-28-2010, 10:16 PM   #24
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the issue is that the PCM can only be calibrated to a certain extent, in order to fo the 35's you'll have to go with an aftermarket programmer of some brand. most will have your tire size. but ask before you purchase. I've never unhooked the battery after usung the DRB for recalibration... but then i've never been much at following directions, as long as it works.

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