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Thread: 2005 LLY DSP5 shifting question?

  1. #1
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    Default 2005 LLY DSP5 shifting question?

    This is my first time doing a DSP5 on a VGT engine. I'm have a problem getting the tranny to shift properly on the 50hp tow tune (IIRC it is 3) and the 100hp mostly giving me troubles (IIRC it is 2), Sorry I cant get a hold of him to confirm the order. The tranny acts confused when to shift under acceleration, even under moderate throttle. Any help would be great.

    casey 2005 dsp 5_1000 slight lope on 2.tun
    98 silverado 4wd excb 5.7l, zz4 cam,roller rockers, shorty headers, 0411 swap, Flash Scan V1 commercial

  2. #2
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    I reflashed the truck last night I allowed for a higher boost by changing the difference between the desired and actual so it will stop throwing the p0234 code and raised the engine torque limiter to a slightly higher number, a good part of the funny shifting went away but not all of it. I'm starting to think it is a defueling issue causing the problems. I dont want to take the defueling out to help prevent tearing the tranny out. Under heavy acceleration the boost hit 32 PSI is that normal for a LLY? Almost forgot to add he has some other modifications including a AFE mouth piece, EGR block off and a AIR DOG 2.
    98 silverado 4wd excb 5.7l, zz4 cam,roller rockers, shorty headers, 0411 swap, Flash Scan V1 commercial

  3. #3
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    A2109 looks a little odd to me...
    2007 CC/SB 4WD, McRat EFI Live, Trans, Trans Cooler and C3 clutch oiling mod by Mike L., SD Sleeves, SoCal Diesel

    2002 CC/DRW 2WD, McRat EFI Live, Trans, Trans Cooler and C3 clutch oiling mod by Mike L., SoCal Diesel

  4. #4
    Lifetime Member killerbee's Avatar
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    You will have to post a log of the offending behavior, to get any assistance with it.
    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"

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