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putting a 5spd. ecu into an automatic car?

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  • putting a 5spd. ecu into an automatic car?

    What problems would this create?
    imagination is a virtue

  • #2
    Isnt the auto tranny controlled by the ECU? I think it is but I'v never messed around with one to be sure. Just thought Ive read it many places before.
    85 Z31 6.0 LSX turbo 766whp/792wtq
    04 GTO, LS6, big cam, porting, N20... underway for summertime daily driver.

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    • #3
      Your car would never shift.
      ""You gota watch out in this weather. Its when them white boys with their turbos come out to play" Mr. Rimpson - UTI Instructor, refering to a slightly damp 50 degree day.

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      • #4
        yeah, but i guess in can go the other way around....

        (i am running Auto 86t ecu in my 5 speed)

        Terrible idea putting those wheels on...

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        • #5
          GotFast? wrote: Your car would never shift.
          Thanks.
          imagination is a virtue

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          • #6


            Not to sure about that....

            Terrible idea putting those wheels on...

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            • #7
              Oh crap...DanTSS had a similar question earlier and I didn't see that AT control unit in my FMS'.

              Hmmm...just wondering here but would an manual ECU not still work in an auto car?? I don't recall seeing anything that says it wont, but I definitely could be wrong.
              Just stand back and throw money.
              Performance costs money.
              Reliable performance costs more.

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              • #8
                Another worthy question is if un-plugging Auto tranny control unit, will it effect the modifications necessary for the electrical aspect of the swap when going from Auto to Manual.(I know what I see in the FSM, but first hand experience is the tell all truth to the scenario)
                *I'll edit/update with my findings when I get to that..
                I am here to help...

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                • #9
                  Higher idle for autos isn't it?

                  So when they are in gear it is at 'normal' idle

                  Terrible idea putting those wheels on...

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                  • #10
                    If that is the only issue then it is a non issue considering the screw on the TB.
                    imagination is a virtue

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                    • #11
                      There is an idle adjustmen on the idle up controls.

                      or do you not have those anymore?

                      Terrible idea putting those wheels on...

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                      • #12
                        Not my car.
                        The car has them, but they maybe trash. The car has yet to run, it was
                        bought incomplete off of ebay.
                        imagination is a virtue

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                        • #13
                          turbo or non-turbo?

                          i have a the idle controls for the turbo sitting in wyoming. you can have them of you need them off the intake plenuim.

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                          • #14
                            84z31 wrote: turbo or non-turbo?

                            i have a the idle controls for the turbo sitting in wyoming. you can have them of you need them off the intake plenuim.
                            Thanks, I'll keep that in mind.
                            imagination is a virtue

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                            • #15
                              Got the car running and drove it around the neighborhood.
                              Haven't incountered any problems by useing the manual ecu with the auto.
                              It idled fine from park to drive and shifted like it should, so far.
                              Haven't got to take it over 35mph yet.
                              imagination is a virtue

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