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Thread: 600 rpm slip limit solved!!!! OS 25941752

  1. #121
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    Quote Originally Posted by THEFERMANATOR View Post
    Have you also lowered the lockup speed in 2nd gear? It doesn't matter if you raise the slip limit, if you are to close to the lockup speed in that gear, the TCM will over ride lockup until the shift is completed. I think this is the issue alot of people are running into with no lockup even after raising the slip limit.
    Ferman - no, I didn't get that far. My biggest frustration turned out to be when I was rolling along on a 2lane and went to stomp it and pass someone. I would slip and slip and slip until the point where I was about to shift to fourth, the. It would finally lock up and drop a few hundred rpm, then shift into 4th and stay locked. It was terrible. Ben's box fixed it instantly.
    2008 LMM

  2. #122
    Lifetime Member THEFERMANATOR's Avatar
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    I have mine locking pretty consistently, but I will say the TCM does have a rather long delay before it will command lockup even once all conditions are met. The TCM tries to overthink everything to protect the trans.
    1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, little of this, a little of that,
    DIAMONDEYE 4" exhaust, CORSA muffler, AFE stage 1 dry filter, custom tuning by me, KENNEDY single pump and pump rub kit.

  3. #123
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    Quote Originally Posted by THEFERMANATOR View Post
    I have mine locking pretty consistently, but I will say the TCM does have a rather long delay before it will command lockup even once all conditions are met. The TCM tries to overthink everything to protect the trans.
    I found no complaints doing it on my buddy's stock turbo LMM, but on my 68stg2r making 100hp over his, no bueno.
    2008 LMM

  4. #124
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    Quote Originally Posted by mitchd View Post
    actually all the slip limit tables in efi are referenced to the wrong memory location as i have discovered based on the fact that i know what table needs to be modified. when i load my working 1200rpm slip limit tune into efi it show me a slip limit of 625rpm, i can change my 1200 limit to anything i like and reload in efi and it still shows 625. its so easy, i dont know how they messed up the reference location.
    Have they fixed this problem with the new update in December?
    02 LB7, EFILive, PPE Boost Valve, 45% Over Injectors, AirDog 165

  5. #125
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    I can't say on the latest release, but about 2 months ago in the beta, I was poking around tweaking my tune and for shits/giggles I maxed out the skip limit table (8k I think?), and the funniest thing happened. In tow/haul mode I had the same shift points but no lockup at all. Usually you get mid 2nd lockup - nope. I didn't go beyond the 'hood to see if it would lockup in 5th or WFO but up through 5th gear at 40'ish mph I had the usual feel of t/h but no lockup.
    2008 LMM

  6. #126
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    So it's been a while since I've been on here but I recently bought another 2006 LBZ head with a 6-speed Allison and I've been playing around with the slip limit and discovered why it will not work for any of you guys, besides the fact that the wrong table is referenced in EFI live...
    Anybody who wants to send me a 6-speed TCU file I'll patch it send it back and you can let me know that it works! Email me the file
    2007 Classic CCLB, LBZ - EFIlive, Custom 4 inch downpipe and exhaust, Stock trans with BD tripple disk shimmed relief and modded knockdown valve.
    35/12.50/17 Toyo Open country MT's
    1987 Toyota 4x4 8" lift, 35/13.5/15 Toyo open country's, Trail gear suspension, 22r turbo on Propane @ 20psi boost GT2860RS turbo, V6 R150 Transmission.

  7. #127
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    loading it in a few mins and taking a quick spin
    2008 LMM

  8. #128
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    I took it for just a really quick spin - works!!!! I hammered the throttle and it locked in 2nd no problem. Then I was in 4th and goosed it - she dropped to 3rd and rev'd a little and locked right up. Then I did less than full throttle hit and she locked right up again. This is great!
    2008 LMM

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