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Thread: 2007 JK Hemi Swap

  1. #1
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    2007 JK Hemi Swap

    Hello all,
    I have a 2007 JK with a Gen 3 Hemi swapped into it using a TR4050. The swap is mainly complete, however I'm running into an issue where the ECU hard cuts RPMs at 4k RPM because it is not registering any speed signal. I know that the PCM accepts speed signal over CAN from a TCM. Is there any way around this in the tune? I know engines can run erratically for other reasons without vehicle speed. Any and all input is welcome!
    Thanks in advance

  2. #2
    Advanced Tuner N2speed's Avatar
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    did you raise the RPM in park in fuel cutoff?


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  3. #3
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    Yes, I tried this among other things. Under the trans tab, the manual trans option is enabled. I'd imagine if I set it as an auto it would cause other issues. It does have a setting for power train protection - minimum speed is the parameter. But I don't have speed input?

  4. #4
    Advanced Tuner N2speed's Avatar
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    post the tune file


    www.n2speed.com
    http://www.amp4x4.com
    [email protected]

    Dodge And GM Tuning Suppport
    Diablosport CMR | HP Tuners