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Thread: Tuning for T-56 transmission swap.

  1. #1
    Potential Tuner WarShrike's Avatar
    Join Date
    Mar 2009
    Posts
    7

    Tuning for T-56 transmission swap.

    Okay, I have a T-56 swap and want to make sure I have the trans settings as close as possible.

    I have a GTO T-56 so the ratios are:
    2.97/2.07/1.43/1.0/.84/.63

    For my car, I have a 3.42 rear gear and running 275/40/R17s for tires.

    What all do I need to change on the speedometer tables? This is running a PCM flashed with the T-5 tables from the dealer.

    Current settings are:

    Code:
    General
    VSS Pulses Per
    Mile:  43700
    Rev - Trans  10.5703
    
    Final Drive Ratio
    Drive Sprocket Ratio   0.000
    Trans Revolutions/Mile   0.000
    
    Gear/Tire Calc
    Current: 7.85
    Auto Scale Transmission Tables: Yes
    FWD: No
    GTO Tables look like this:
    Code:
    General
    VSS Pulses Per
    Mile:  47992
    Rev - Trans  40.0000
    
    VSS Output Pulses Per
    Mile:   10020
    Mile - ABS:   128000
    
    Final Drive Ratio
    Drive Sprocket Ratio   3.46
    Trans Revolutions/Mile   2448.5741
    
    Gear/Tire Calc
    Current:
    Tire Size: 24.72
    Gear Ratio: 3.46
    Auto Scale Transmission Tables: Yes
    FWD: No

  2. #2
    Senior Tuner IDRIVEAG8GT's Avatar
    Join Date
    Aug 2010
    Location
    Roswell, N.M.
    Posts
    1,956
    You sir are in the 6 cylinder section.
    Gray Ghost- The abomination. 2007 Chevrolet Silverado CCSB. 98mm turbo, nitrous, 428LSX, Rossler 80E with a brake. Finally finished. 23 psi, no numbers, Slow as hell.

    PBM G8- Aluminum 364, twin Precision 67/66 turbos, 6L90 trans swap, CTS-V/Vaporworx fuel system, slowly making progress.

    Dads 2011 CTS-V- Stock bottom end, stock heads, LS9 cam, pullies, ported blower, ported TB, D3 goodies, and lots of nitrous.
    618/618 motor
    906/862 spray

    Caterpillar 50 Forklift- Duramax swap

  3. #3
    Potential Tuner WarShrike's Avatar
    Join Date
    Mar 2009
    Posts
    7
    Precisely! That's because this was for a V6 car. So I put it in here to get some guys who have tuned the V6's before. I got a faster response on a local board :lol:

    I've got it fixed, just adjusted the scale on the speedometer stuff a while back and fudged the numbers till the GPS reflected it pretty well.

    Most guys here won't know me, but I'm a little more well known on the V6 boards.