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Thread: Predator @65HP setting

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  1. #1
    Join Date
    Jan 2005
    Location
    Sandwich,IL
    Posts
    37

    Default

    Slippage in this case is the RPM rising quickly after a shift without the truck accelerating like it should. I guess I should use the Predator to give me an actual readout in percent. Do you suggest someone rides along to watch the Predator readout? It may be just be the torque converter. My truck has 65K on it, the spin on was replaced at 55K. I don't really thrash the truck, but on occasion when the road is empty at a 4 way stop, well you know, I might indulge a little.... I'll try tow haul mode over the weekend to see if it acts any different. Has anyone tried the Bully Dog shift enhancer?

    Thanks
    Jeff
    2002 D/A Crewcab shortbox 4x4,Victory Red, LT265 Cooper ST, Extreme alloys, Truxedo, 4" Flo-Pro turbo back, S&B intake, Predator

  2. #2
    Join Date
    Apr 2001
    Location
    CA
    Posts
    13,583

    Arrow

    If you were in non T/H mode and 3rd gear, you were seeing the torque converter differential. That is completely normal.

    Your predator won't show your tranny slippage. It will only indicate if a TCM code is present, but doesn't give any details. If you aren't seeing a P0700 DTC, then you aren't slipping. Well, not enough, anyway.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  3. #3
    Join Date
    Jan 2005
    Location
    Sandwich,IL
    Posts
    37

    Default Torque Converter

    Thanks DmaxMaverick, I feel much better about the trans. But the question now becomes, what will firm up the TC so that it doesn't lag so much between shifts. Second is pretty solid, but 3rd and 4th seem to take awhile to catch up with the rpm's. Is this what the TCM "learning" should do? Should I just use T/H when I'm looking for more firmness in the shifts? Or does one move up to a triple clutch TC? $$$.

    Jeff
    2002 D/A Crewcab shortbox 4x4,Victory Red, LT265 Cooper ST, Extreme alloys, Truxedo, 4" Flo-Pro turbo back, S&B intake, Predator

  4. #4
    Join Date
    Apr 2001
    Location
    CA
    Posts
    13,583

    Arrow

    I don't think a triplelock TC is a good idea. You need the TC to take up the slack between the engine and a stock tranny. Take that away, and the tranny will become a failure point. The learn process will firm it up a bit over time, but will not be as firm as with stock power levels. The TC is calibrated for stock power, so forcing more through it will cause the slop. Use T/H if you want a more firm connection.

    The alternative is to upgrade the tranny and TC. The performance grades will hammer gears like a manual.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  5. #5
    Join Date
    Aug 2006
    Location
    Left Coast
    Posts
    112

    Default

    I am running the same tune and mods in my 06 LBZ, but never felt any slipage.

    Would the Transgo Jr be enough to overcome this issue and get a really solid feel? I can feel the defueling during shifts now, perhaps this is all Jeff feels?

    FB
    2006 GMC D/A C/C S/B, Snug Top Shell, Bed-slider
    33 inch Toyos, 17/8 Pro Comp Wheels, 4 in SS MBRP Exhaust-Turbo back, Evolution Tune, Mag-Hytec on Rear and Trans, Tranco Jr Shift Kit.

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