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Thread: T87 Allison Transmission Tuning

  1. #1
    Diesel Forum Support Site Admin
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    Default T87 Allison Transmission Tuning

    For those of you who don't subscribe to our newsletter....we've just released the below:

    To complement EFILive's LML Duramax engine tuning software, T87 6 Speed Allison transmission tuning is now available.

    This initial tuning release delivers key transmission parameters including shift speeds, TCC control and shift times. While the LML engine controller has a read restriction in place, the T87 transmission controller does not. Customers can expect read times of approximately 2 minutes and 30 seconds. Both full flash and calibration only flash options exist with calibration flashing taking just 30 seconds.

    Controller locking for tuners to restrict access to tune file information has been developed for this controller. Tuners can activate Auto-Lock by applying the EFILocker Custom Operating System Patch.



    The GM Transmission Supported Vehicles page has been updated. T87 Allison tuning software is a FREE software upgrade for existing customers who update their software to the July 2016 Beta release or later.

    Beta software can be found here https://forum.efilive.com/showthread...a-Test-Release

    The EFILive Development Team.

  2. #2
    Lifetime Member GMC-2002-Dmax's Avatar
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    Thank You !!!!
    www.ridgerunnerdieselperformance.com

    tony@ridgerunnerdieselperformance.com

    Tuner of many, many Duramax and Cummins Diesels.


  3. #3
    Lifetime Member
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    Right on thank you.
    2015 3500HD crew cab long bed, 6" fabtech, slightly tuned, emissions intact.
    2005 dmax ccsb, EFI live tuned DSP 5 Full built motor, S471 billet single, More better built trans this time. and lots of other things.
    1984 CJ7 powered by a 2000 LS1. 4L60E.
    2012 Jetta TDI 6 speed manual, (yes the dirty the bastard haha)
    2003 Jetta TDI,
    1986 K10 LQ4/4L80E

  4. #4
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    So I have been playing with this a bit but something must be missing. Since I like the way tow haul mode works I thought I would make regular mode work close to that. I copied all upshift and downshift parameters from tow haul and pasted to regular mode. Only ones I didn't mess with were shift timing for individual gears. It still shifts way different in tow haul. It hangs all shifts just past 2200rpm at light throttle in T/H. Maybe the engine controller has some influence on T/H mode ? Or are there light throttle RPM maps not developed yet ?
    Thanks, Jeff

  5. #5
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    Compare your TCC locking to the TH TCC
    2008 Chevrolet 3500HD DRW LTZ
    285/75/17 Nitto Dura Grapplers, 4.56 gears, Front and rear ARB lockers, Efi Live tuning by me, Raptor 160 LP, Cognito 4-6 NTB Lift, 4" Exhaust, Built Trans by Mike L.

    2004 LB7 Duramax, EFI Live with DSP5 Tune
    stage 4 SC transmission, 265/70/16 tires

  6. #6
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    looking at the T87 layout for the 1st time. am i to understand that 2 of 6 segments cannot be read?

  7. #7
    Forum tyhee Site Admin GMPX's Avatar
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    We do not read the segments from the external watchdog CPU.

    We do read:
    Operating system (incl Boot)
    Transmission
    Diagnostic
    System

    We don't read:
    2nd Operating system
    2nd Calibration
    Need official EFILive help, please go here.
    For tuning support please post your questions on this forum (or other auto forums).
    Sorry if I don't respond to your PM, don't take it personal.


  8. #8
    Junior Member
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    So there is no way to increase pwm on tcc ? If not ,how can we ever expect the converters to live behind 1k of tourqe?
    2001 z06 236-242 617-622 114 lsa headers off rd exhaust haltec int. ls6 int. 315/35/18 drag radial ,cos #5 , 100 shot nos!
    2007 tbss headers off rd 4 inch intake, 160 stat , efans,2wd, 275,315,s
    2013 sonic rs auto
    2006 3500 chevy pu duramax/alli,

  9. #9
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    The 67 or whatever that number is in the tune is the max or 100% duty cycle on the solenoid valve. Numbers above that wont gain you anything except maybe a burned out coil

    If you want better holding power you need a better converter
    2008 Chevrolet 3500HD DRW LTZ
    285/75/17 Nitto Dura Grapplers, 4.56 gears, Front and rear ARB lockers, Efi Live tuning by me, Raptor 160 LP, Cognito 4-6 NTB Lift, 4" Exhaust, Built Trans by Mike L.

    2004 LB7 Duramax, EFI Live with DSP5 Tune
    stage 4 SC transmission, 265/70/16 tires

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