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Thread: VCM and custom tune question

  1. #1
    Potential Tuner
    Join Date
    May 2021
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    1

    VCM and custom tune question

    Hello,

    Am i possible with the vcm and a HP tuner to edit custom tune in my PCM?
    There currently is a custom lund tune on it and i only want to change the rear axle ratio on it.

    So can i download the tune with vcm and make that change in it?

    kind regards Michiel

  2. #2
    Tuning Addict 5FDP's Avatar
    Join Date
    May 2012
    Location
    Rogers, MN
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    11,404
    I am not familiar with a Lund Tune or who that is but if the computer is not locked, you can read and edit it.

    Suppose you could contact them to see if they lock their tune files.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  3. #3
    Potential Tuner
    Join Date
    May 2021
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    1
    Has anyone ever found that their stock tune has the gear ratio set incorrectly to what the truck has. I have a 2010 Ford F150 4.6 2valve regular cab. my stock gear ratio is set at 3.73 gears but my truck has 3.42 gears. with that being said does anyone know if would hurt to change to correct gear ratio?