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Thread: Speedometer calibration problems

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  1. #1
    Join Date
    Mar 2011
    Location
    Grand Rapids Mi
    Posts
    39
    It was the drac, thanks for the tip she's all dialed in now :-)

  2. #2
    glad you got it working, but why is your drac still in the loop? i wired my speedo ouput from pcm directly to the cluster. is this the wrong way to do it?

  3. #3
    Join Date
    Mar 2011
    Location
    Grand Rapids Mi
    Posts
    39
    mine was in the gauge cluster its self, so i could not figure out a way to bypass. some other trucks had a remote located drac mine did not it was a hassle but it felt great when it worked.
    1990 rcsb 5.3 4l60e swap 4.10 gears 3900lbs with a peg leg
    14.3 @ 95 1/4 mile
    9.1 @ 76 1/8 mile
    2.11 60' on street tires open diff

  4. #4
    gotcha, guess i caught a break and didnt even know it.

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