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Speedo Correct? - ELectronic

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by woody9, Jun 18, 2001.

  1. woody9

    woody9 1/2 ton status

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    Location:
    Howell, MI
    You guys seem to have all the answers one could ever wish for, so let me toss one out.
    Just put a 14 bolt FF 4:10 eaton under my trusty Chevy, but.. seems the speedo is now 20% off (had 3:54 gears before).
    When I went to see what color gear I had in the x-fer case, it wasn't a gear, but a sensor! electronic speedo!
    Does this require DEALERSHIP REPROGRAM (boo hiss!!!) or is there somewhere else a tweak can be made?

    Thanks!
     
  2. CaptCrunch

    CaptCrunch 1/2 ton status

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    Location:
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    I believe your truck's speedo and odometer and that can be reprogrammed w/ one of Superlift's VSS chips... or something like that... maybe do a search on the offroad.com board... lots of IFS guys there w/ newer rigs. Or else you could check in w/ Superlift about it. One place I found that also may be of help is here...

    http://www.geocities.com/milnerlives_2000/blazer.htm
     
  3. fr8train

    fr8train 1/2 ton status

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    I would go with the Superlift VSS correction device. Its one bad little toy. No matter what tire/gear combo you ever change to again you can reset it and not have to dig underneath your rig to do it. I think they run about 169.99 at <A target="_blank" HREF=http://www.tyres1.com>http://www.tyres1.com</A>
     
  4. fr8train

    fr8train 1/2 ton status

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    One other trick is to go with a VDO unit with a calibrateable speedo. Solowookie has one in his truck.
     

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