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Thread: Allison converter lock during shift D5074

  1. #1
    Lifetime Member DURAtotheMAX's Avatar
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    Default Allison converter lock during shift D5074

    Ross is there any possibility you might be able to add this table (D5074) for the 5-speed TCM's?

    This is a great table, I was really excited to see it just now when I installed the latest version on EFILive.

    On the LLY 5-speed TCM's, when you go WOT on the highway and the trans does a downshift/kickdown, the converter stays locked through the shift.

    On 2001-2003 LB7 5-speed TCM's, when you go WOT, it unlocks the converter during the shift...and then of course the TCM sees huge slip and takes forever to re-lock the converter...so if you go to pass someone on the highway and floor it, the trans downshifts, engine revs up.....but you dont actually go anywhere because the converter just unlocked and is now slipping and not transferring any power.

    It would be just our luck that allison programmed them this way....because the 01 TCM's shift much better than the later LLY TCM's. So its kind of a double edged sword...would you rather have a nice WOT kickdown where it actually puts you back in the seat and accelerates when you want to pass someone.....or would you rather have a trans that shifts goofy sometimes. :(

    If we could make the 01-03 TCM's not force an unlock on a WOT kickdown that would be awesome.

    thanks
    Ben
    2005 Silverado, CC/SB, 4x4, LT, LILLY/Allison
    12.9s @ 108 mph

    many thanks to Ross and Paul

  2. #2
    Lifetime Member killerbee's Avatar
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    I don't have that table. Is it enabled on the stock 5-4 shift?
    Michael, Systems Engineer 04.5 D-max LLY, Phoenix, Arizona Email
    Custom Tuning Services
    DURAMAX/CUMMINS ECM's TCM's for sale, all years, 20% wholesale discount available
    EFILive's first VGT "Software Wastegate Tune"

  3. #3
    Lifetime Member DURAtotheMAX's Avatar
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    Default

    Quote Originally Posted by killerbee View Post
    I don't have that table. Is it enabled on the stock 5-4 shift?
    Did you even read my post?
    2005 Silverado, CC/SB, 4x4, LT, LILLY/Allison
    12.9s @ 108 mph

    many thanks to Ross and Paul

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