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Calibrating speedometer on Ram 2500 with oversized tires?

Discussion in 'Trucks and Trailers' started by C Jovingo Landscaping, Oct 28, 2012.

  1. C Jovingo Landscaping

    C Jovingo Landscaping LawnSite Senior Member
    Posts: 436

    My truck has bigger then factory tires & I am actually going faster than what speedo is reading. I'm researching calibration of speedometer & am not gonna go lay under the truck in the rain. Does anyone know if '03 RAM 2500 with Hemi auto transmission, has mechanical or electronic speedometer? Anyone ever calibrate their own speedometer? Advice?
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  2. Spring Valley Lawn Service

    Spring Valley Lawn Service LawnSite Member
    Posts: 142

    I think you shoud be able to buy a programmer. I did this for a 97 Chevy.
  3. C Jovingo Landscaping

    C Jovingo Landscaping LawnSite Senior Member
    Posts: 436

    How much is programmer? After researching for couple hours...seen something about programmers. Also taking it to dealer for $40-$100 for calibration. Read that electronic speedo can be calibrated by holding TRIP button down while starting engine then release. Then drive pre measured 2 miles...Blah, blah, blah. Was wondering if this last method will work on my truck as I can use GPS to drive the 2 miles.

    This is only forum I belong to, so figured I'd check here. May join dodge forum to see if I can do it myself (the cheapest). Programmer probably costs more than dealer doing it.
    Posted via Mobile Device
    Last edited: Oct 28, 2012
  4. precision8m

    precision8m LawnSite Senior Member
    Posts: 349

    There is a product called scangaugeII. Look it up. I have one and love it. It auto corrects your speed based on tires, has accurate mpg, and several other data features. Even pulls check engine codes.
    Posted via Mobile Device
  5. JNB Construction

    JNB Construction LawnSite Senior Member
    Posts: 282

    Thanks, didn't know about the product. I just ordered one for my wife's F150.
  6. boatcapt

    boatcapt LawnSite Member
    Posts: 91

    If your going to get a programmer for a dodge, get the SMARTY.
  7. cuttin-to-the-Max

    cuttin-to-the-Max LawnSite Bronze Member
    Posts: 1,329

    How about a GPS... Most have speedo features...\
  8. LandFakers

    LandFakers LawnSite Fanatic
    from CT
    Posts: 6,229

    I think you may have been going a little fast!!!!!

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