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Thread: CTS-V A6 - Need help with trans tune

  1. #1
    Tuner in Training
    Join Date
    Dec 2008
    Posts
    28

    CTS-V A6 - Need help with trans tune

    My trans tune never feels like it should at part throttle or wot. My immediate problem is that at the track last night it hit the limiter on the 1-2 shift every time. I tried lowering the shift rpm down to 5950 and it didn't make any difference. Any ideas based on the tune and log?

    Mods:

    2.4 Upper
    8.6 Lower
    Ported Snout
    Ported TB
    Headers
    ID 850s
    HX
    DP6X Cam
    Lid spacer
    Airaid
    Attached Files Attached Files
    2006 GTO A4
    LS3 427

  2. #2
    Advanced Tuner
    Join Date
    Jun 2011
    Location
    Montreal, Canada
    Posts
    758
    Curious on this. I don't see anything. I assume you are running with traction control off ?
    2007 Corvette C6 Vert. A6
    LME LS402, Pat G custom cam, ATI 10% OD Damper
    Circle D triple disc 2600, 3.42 Diff
    YSI, 3.0 pulley, ID 1000's
    Alky Control Meth,
    ARH 1 7/8 headers,
    1009 RWHP @ 7000, 817 RWT @ 6000

  3. #3
    Tuner in Training
    Join Date
    Dec 2008
    Posts
    28
    Traction and stability control are off. It flares a little on the 2-3 shift at part throttle as well. The tuner only threw in a canned trans tune without street driving it. Then I have been trying to tweak it on my own and I am past the basics of what I know how to try.
    2006 GTO A4
    LS3 427

  4. #4
    Senior Tuner Russ K's Avatar
    Join Date
    Dec 2005
    Location
    Regina, Sask.
    Posts
    4,213
    Ok, these trans need the torque management reduced by 50%, NOT disabled. Make the following changes; enable upshift torque reduction. CT, Power Downshift & Garage Shift are OK disabled. Go to Shift Torque Factor & change to .5 (from your .250). Next go to Spark Limiter > Spark Min-TqMgt and enter 0 in any cell that has - values.

    For the shift firmness, add 60 psi to the entire stock shift pressure tables. Next return the Shift Time Torque Adder Upshift tables. To start, I would multi the entire shift time tables by .75. Then to firm up the shifts further, multi the tables by .9 at a time.

    Also return your WOT shift speeds to stock as you have them higher than stock.

    Russ Kemp

  5. #5
    Tuner in Training
    Join Date
    Oct 2017
    Posts
    12
    i have a problem similar, as if the traction control was on
    mal cambios cadi.hpl