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Thread: Need blackbox 4L80E tune for my 4L80E segment swap

  1. #1
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    Default Need blackbox 4L80E tune for my 4L80E segment swap

    Long term I think I'd prefer to run the 60E segment, but I if I can flash in a 80E segment and drive home from the shop with all 4 forward gears, that'd be sweet. I didn't see one in the repository and my searching thus far has been fruitless, I'm to the point where I'm ready to pull over suspect vehicles so I can beg to download their stock tunes. Truck in sig is in the ending stages of a 4L80E swap and I need to make it driveable so I can start making money with it.
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

  2. #2
    Lifetime Member EagleMark's Avatar
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    Not sure what OS you have?

    I think theSuburban 7.4L came with 4l80E and OS 09365095

    There's a GMC Siera 5.7L with same OS 09365095

    Both are on Tune File Depot so that should be an easy segment swap?

  3. #3
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    That 5.7 Has an 80E tune? I'm not at home to be able to open it.
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

  4. #4
    Lifetime Member EagleMark's Avatar
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    No. I beleive the 7.4L is a 4L80E so there is your segment swap to the 5.7L GMC Seira 5.7L. So both halves are available in same OS.

    Problem then is EFI Live will not do a full flash of Black Box PCM. So what OS do you have? If not correct OS for 4L80E then you would need a 7.4L 4l80E PCM and segment swap the 5.7L engine in... it's a pain... and another PCM to license.

    Or have someone with TunerCat full flash the PCM to start?

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    Well shit, looks like my $1000 transmission swap just became an $1,125 swap. I've got a 411 in the garage, been holding off the swap due to laziness/cheapness. I already have all the tunes I need to get a 411 on the road.
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

  6. #6
    Lifetime Member EagleMark's Avatar
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    Well yeah there's that option too!

    But if you have same OS as the 4l80E file? What is your OS?

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    16263425

    I ctrl f'd that in the repository and found something weird. The only GMC with that OS claims to be a manual, but in the speedo sections its gear ratios are that of the 4L60E. I was using the speedo section to verify gear ratios to tell me which trans the OS had because 3 Chevies had this OS in the repository.
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

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    I have a .bin for a 1998 5.7, 4L80e truck. You should be able to load this into EFILive and flash it. However this website won't let me attach a .bin. PM me your e-mail address and I will send it to you.

    Jeff
    98 GMC RCSB 2WD, Internally stock 305 w/Twin T-3 junkyard Turbos,4L80e,Ramjet intake,42lb.inj., 0411PCM, COS3,4675LBS w/me in it. Best Time on 5 passes-13.01@110

  9. #9
    Lifetime Member EagleMark's Avatar
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    I'd like a copy to please?

    Now I've only tried this once, but I still believe it won't work because EFI Live will not do full flash of Vortec PCM.

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    Quote Originally Posted by EagleMark View Post
    I'd like a copy to please?

    Now I've only tried this once, but I still believe it won't work because EFI Live will not do full flash of Vortec PCM.
    I opened the .bin in EFILive and saved it. Now it is .tun. So, This has been from .bin to .tun I have not tried it on anything. I did notice that there is no VIN in it. Here it is . Use at your own risk.

    Jeff
    Attached Files Attached Files
    98 GMC RCSB 2WD, Internally stock 305 w/Twin T-3 junkyard Turbos,4L80e,Ramjet intake,42lb.inj., 0411PCM, COS3,4675LBS w/me in it. Best Time on 5 passes-13.01@110

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