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Old 04-05-2012, 06:24 PM   #1
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Correcting spedo and odo

Now I've got bigger tires, I'd like to reset the speedometer and odometer. Are there any not so expensive ways to do this?

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Old 04-05-2012, 08:35 PM   #2
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Bump

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Old 04-05-2012, 08:38 PM   #3
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Match your gears to your tires using the chart in the link below.... it will tell you what speedo gear you need to correct your speedometer.....

Jeep Wrangler Speedometer Gear Fix
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Old 04-05-2012, 09:23 PM   #4
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Rubi is 4.11 correct? This is a very helpful, thank you.
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Old 04-05-2012, 10:44 PM   #5
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Rubi's don't use a speedo gear, you need to correct it electronically. In theory the simplest way is to have a dealer or someone else with the right equipment do a reflash, but a lot of folks have had problems with that actually working out right. There are several aftermarket options, this seems to be one of the most straightforward - Blue Monkey Motorsports, Inc. : : : : HealTech Electronics SpeedoHealer (R): Product Overview
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Old 04-05-2012, 10:50 PM   #6
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Well that sucks. Nothing cheaper?
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Old 04-06-2012, 07:04 AM   #7
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Yeah, there is. It's not as neat and you have to program it yourself, but it's pretty simple. I installed the Dakota Digital last fall and with the help of a GPS and a little experimentation it's dead on. I installed the unit on the side of the glove box. I was gonna do a write-up, but never got to it and I forget my settings, but I followed other write-ups I found with google. I don't have a Rubi, but my Rugged Ridge Mega Short SYE uses an electronic pickup and a tone ring.

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Old 04-06-2012, 08:43 AM   #8
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Much better price.
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Old 04-06-2012, 08:57 AM   #9
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I downloaded a speedometer app on my phone, and discovered after 45mph mine's off bout 10-15 mph! I was gona look into this too, but didn't wana pay to have it fixed.
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Old 04-06-2012, 11:36 AM   #10
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Quote:
Originally Posted by Robin in VA View Post
I downloaded a speedometer app on my phone, and discovered after 45mph mine's off bout 10-15 mph! I was gona look into this too, but didn't wana pay to have it fixed.
Wow thats way off! I am hoping to find out a cheap fix too. sounds like the rubicon is an electric fix which means $
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Old 04-06-2012, 01:50 PM   #11
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Wow thats way off! I am hoping to find out a cheap fix too. sounds like the rubicon is an electric fix which means $
yea! well download the app so you have a good idea of it... by yourself some time before it gets expensive!
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Old 04-06-2012, 02:14 PM   #12
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What is the name of the app?
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Old 04-06-2012, 02:23 PM   #13
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Mine was 90 mph on the speedo and 69 on the GPS... just picked up my 39 tooth speedo gear for $25.... I will report back.....
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Old 04-06-2012, 06:37 PM   #14
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For the speedo gear in 39 tooth is dead on up to 55 and 1 mph slow at 70-75 with 4.56's and 33's
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4" Lift, 4.56's, 33" Duratracs on M/T Classics
RR SYE, Tatton CV, MML, BL, TT, Dynomax Exhaust
Hella Lighting: Driving, Fogs and H4 E-Codes
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Old 04-08-2012, 04:23 AM   #15
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What is the name of the app?
I've been using UlysseSpeedometer. I tested it in my daily driver and it was accurate for me, then I used it in my TJ.
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Old 04-08-2012, 10:06 AM   #16
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For the iPhone, I used Speedometer Pro. Awesome lil app that even does HUD on your windshield.

Allows you to set speed alerts ... VERY helpful....

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4" Lift, 4.56's, 33" Duratracs on M/T Classics
RR SYE, Tatton CV, MML, BL, TT, Dynomax Exhaust
Hella Lighting: Driving, Fogs and H4 E-Codes
NOPE! ... and NEVER will be...
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Old 04-17-2012, 12:06 PM   #17
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Where is the actual gear that you need to replace located. I have a 99 2.5l
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Old 04-17-2012, 12:10 PM   #18
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The back end of the transfer case next to the output shaft.

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