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Thread: Shift help appreciated

  1. #1
    Advanced Tuner
    Join Date
    Jun 2011
    Location
    Montreal, Canada
    Posts
    758

    Shift help appreciated

    I have been trying to dial in my shift points for what seems like forever. I have read everything I can find on this issue but maybe some of you experts can spot my issue, since I cant seem to get it right.
    I run my car in Drive at the track and have it shifting right where I want it for the most part. The only issue is the 2-3 shift often hits the rev limiter. I have lowered rpm and speed and there seems to be no change.
    As you can see in the log it shifts between 68-6900 for some reason.

    Any ideas to try would be much appreciated.

    The log attached is of the previous tune. I got the 1-2 shift a bit lower with no problem but the 2-3 just wont seem to change no matter what I do.
    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

  2. #2
    Advanced Tuner
    Join Date
    Apr 2009
    Posts
    613
    Your up and down shift mph is 41 for the 2-3 3-2 your down shift should be at least a couple lower
    1997 Trans Am WS6 - LS1 swap - TR224 - Pacesetter Longtubes - Yank SS3600
    - 3.42 Moser 12 bolt - Wilwood Brakes - HP Tuners tuned - P1SC-1 Procharger

  3. #3
    Advanced Tuner
    Join Date
    Jun 2011
    Location
    Montreal, Canada
    Posts
    758
    Quote Originally Posted by flame View Post
    Your up and down shift mph is 41 for the 2-3 3-2 your down shift should be at least a couple lower
    Thanks for looking and pointing that out. I will fix it although I dont think thats the problem. I just looked at the tune before the last changes and the 2-3 was higher. I forgot to lower the 3-2 when I adjusted. It did the same thing before the changes.
    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

  4. #4
    Tuner
    Join Date
    Mar 2006
    Location
    DFW, Tx
    Posts
    156
    I've heard of a few people mentioning that they had to bring some TM back in the get a wot shift above a certain power level. Try that maybe?
    2013 ZL1 A6

  5. #5
    Advanced Tuner
    Join Date
    Apr 2009
    Posts
    613
    1997 Trans Am WS6 - LS1 swap - TR224 - Pacesetter Longtubes - Yank SS3600
    - 3.42 Moser 12 bolt - Wilwood Brakes - HP Tuners tuned - P1SC-1 Procharger

  6. #6
    Tuner in Training
    Join Date
    Jun 2008
    Location
    Ft Worth, TX
    Posts
    22
    Am I looking at your log wrong or do you not log current gear?
    I log it so I can see when the shift was commanded as opposed to when it occurred.
    Also, TPS is not showing and I'm trying to figure out the dip in airflow.
    2020 C8 - just headers for now
    2007 Silverado 4.8