Results 1 to 13 of 13

Thread: I want tcc to lock at a lower speed..nothing helps

  1. 10-19-2005 #1
    S2H
    S2H is offline
    Senior Tuner S2H's Avatar
    Join Date
    Apr 2005
    Location
    Schexnayder Racing - Arnaudville LA
    Posts
    4,387

    I want tcc to lock at a lower speed..nothing helps

    I am tuning a buddies car..evrything is done except he wants the tcc to lock at a lower speed..
    right now its locking in 4th at 40 mph....
    he wants it to lock around 30-35
    we tried changing the TCC apply/release speed vs tps table...
    and nothing changes it....
    even tried setting it higher and lower.... but nothing changes no matter what we do.
    any advise is appreciated. thanks

    98 Camaro
    yank 4400
    Longtubes
    lid
    ls6 intake
    z06 cam
    patriot 6L heads
    a whole lot of rip ya a new one pull ya back thru the seat power...LOL

    -Scott -
    Reply With Quote Reply With Quote
  2. 10-19-2005 #2
    12secSS
    12secSS is offline
    Senior Tuner
    Join Date
    Jul 2004
    Posts
    1,579

    Re: I want tcc to lock at a lower speed..nothing h

    It could be that the TCC needs more time to apply, considering his big stall. Post up the shift tables, TCC table and a possible scan. Or just send me the HPT file and I can take a look at it and possibly explain what is happening, if I can figure it out.
    Reply With Quote Reply With Quote
  3. 10-19-2005 #3
    S2H
    S2H is offline
    Senior Tuner S2H's Avatar
    Join Date
    Apr 2005
    Location
    Schexnayder Racing - Arnaudville LA
    Posts
    4,387

    Re: I want tcc to lock at a lower speed..nothing h

    e-mail sent
    -Scott -
    Reply With Quote Reply With Quote
  4. 10-20-2005 #4
    jimmyblue
    jimmyblue is offline
    Senior Tuner
    Join Date
    Nov 2002
    Location
    Central Florida
    Posts
    2,503

    Re: I want tcc to lock at a lower speed..nothing h

    Post the apply/release table and be sure you're
    not messing around where it makes no difference
    (like the Performance table, which does nothing).
    I am locking at 37MPH at lowest throttle.
    Reply With Quote Reply With Quote
  5. 10-20-2005 #5
    S2H
    S2H is offline
    Senior Tuner S2H's Avatar
    Join Date
    Apr 2005
    Location
    Schexnayder Racing - Arnaudville LA
    Posts
    4,387

    Re: I want tcc to lock at a lower speed..nothing h

    our last attempt before seting it back to stock cause it didnt seem to make a difference was this
    Code:
    TCC Apply/Release Speed vs. %TPS vs. Gear - Normal

210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000
20.00000   20.00000   22.00000   27.00000   33.00000   38.00000   43.00000   66.00000   66.00000   66.00000   66.00000   66.00000   66.00000   210.00000   210.00000   210.00000   210.00000
30.00000   30.00000   30.00000   32.00000   33.00000   33.00000   33.00000   33.00000   33.00000   33.00000   33.00000   33.00000   33.00000   210.00000   210.00000   210.00000   210.00000
210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000
19.00000   19.00000   19.00000   19.00000   21.00000   23.00000   24.00000   25.00000   27.00000   29.00000   33.00000   40.00000   52.00000   62.00000   210.00000   210.00000   210.00000
27.00000   27.00000   27.00000   27.00000   30.00000   31.00000   31.00000   31.00000   31.00000   31.00000   31.00000   31.00000   31.00000   31.00000   210.00000   210.00000   210.00000
    it still locked at 40
    -Scott -
    Reply With Quote Reply With Quote
  6. 10-20-2005 #6
    jimmyblue
    jimmyblue is offline
    Senior Tuner
    Join Date
    Nov 2002
    Location
    Central Florida
    Posts
    2,503

    Re: I want tcc to lock at a lower speed..nothing h

    That table looks like it's commanding lock at 30 but
    on my 3.42s car I won't be in 4th until about 35MPH,
    and that's grandma shifting. What is the 3-4 minimum
    shiftpoint? Is the lockup maybe just whatever clears
    that cycle? With the big converter you might not even
    feel the 3-4 at low pedal because everything paddle-
    wheels along at 3000RPM?
    Reply With Quote Reply With Quote
  7. 10-20-2005 #7
    S2H
    S2H is offline
    Senior Tuner S2H's Avatar
    Join Date
    Apr 2005
    Location
    Schexnayder Racing - Arnaudville LA
    Posts
    4,387

    Re: I want tcc to lock at a lower speed..nothing h

    heres the normal shift table
    and yeah.he kind of wants it to grannyt shift when putting around...save on gas....well..as much as you can with a 4400 stall..LOL

    Shift Speed vs. %TPS vs. Shift - Normal
    Code:
    6.00000   6.00000   7.00000   8.00000   10.00000   11.00000   13.00000   15.00000   17.00000   19.00000   20.00000   22.00000   22.00000   22.00000   22.00000   22.00000   22.00000
11.00000   11.00000   12.00000   15.00000   18.00000   21.00000   25.00000   28.00000   32.00000   34.00000   38.00000   40.00000   42.00000   44.00000   45.00000   46.00000   48.00000
15.00000   15.00000   18.00000   22.00000   27.00000   31.00000   35.00000   54.00000   167.00000   167.00000   167.00000   210.00000   210.00000   210.00000   210.00000   210.00000   210.00000
5.00000   5.00000   5.00000   5.00000   5.00000   5.00000   5.00000   5.00000   5.00000   5.00000   5.00000   5.00000   5.00000   5.00000   5.00000   5.00000   19.00000
10.00000   10.00000   10.00000   10.00000   11.00000   13.00000   15.00000   16.00000   18.00000   19.00000   22.00000   23.00000   25.00000   46.00000   31.00000   35.00000   45.00000
16.00000   18.00000   20.00000   23.00000   26.00000   30.00000   34.00000   41.00000   78.00000   88.00000   95.00000   101.00000   108.00000   121.00000   108.00000   121.00000   121.00000
    -Scott -
    Reply With Quote Reply With Quote
  8. 10-20-2005 #8
    jimmyblue
    jimmyblue is offline
    Senior Tuner
    Join Date
    Nov 2002
    Location
    Central Florida
    Posts
    2,503

    Re: I want tcc to lock at a lower speed..nothing h

    Right. So I see the 3-4 upshift is 40, the converter
    won't do the 4th gear lockup until it's in 4th, I think
    is what the deal is.
    Reply With Quote Reply With Quote
  9. 10-20-2005 #9
    S2H
    S2H is offline
    Senior Tuner S2H's Avatar
    Join Date
    Apr 2005
    Location
    Schexnayder Racing - Arnaudville LA
    Posts
    4,387

    Re: I want tcc to lock at a lower speed..nothing h

    even though its in 4th already at low TPS?? at a much lower speed??

    watched a log....in 4th long before 40...


    but what do you suggest I change 3rd to to make it work
    -Scott -
    Reply With Quote Reply With Quote
  10. 10-21-2005 #10
    jimmyblue
    jimmyblue is offline
    Senior Tuner
    Join Date
    Nov 2002
    Location
    Central Florida
    Posts
    2,503

    Re: I want tcc to lock at a lower speed..nothing h

    I guess I misread that table, thought the 40.000 ... line
    was the 3-4.

    Can you see in logs the TCC state and whether it's holding
    off command to lock (TCC mode), or something is maybe
    starving the TCC for juice so it just can't do the job? The
    line pressure % at low throttle is marginal even for my
    converter, maybe it just can't get the juice it needs to
    grab? Is the PWM% minimum still stock?
    Reply With Quote Reply With Quote
  11. 10-21-2005 #11
    12secSS
    12secSS is offline
    Senior Tuner
    Join Date
    Jul 2004
    Posts
    1,579

    Re: I want tcc to lock at a lower speed..nothing h

    Scott,

    Yup, as per my email ... if you could log the TCC mode, that should tells us more of what is going on.
    Reply With Quote Reply With Quote
  12. 10-21-2005 #12
    S2H
    S2H is offline
    Senior Tuner S2H's Avatar
    Join Date
    Apr 2005
    Location
    Schexnayder Racing - Arnaudville LA
    Posts
    4,387

    Re: I want tcc to lock at a lower speed..nothing h

    I'm going to go do a dyno "spark advance" tuning with him today...I'll have him take me out and drive and log to see whats up...

    also..we were able to lock the TCC with the PCM controls in every gear at every rpm....I even locked it in 4th taking off from a light on acident once....
    so I know the tranny has tehguts to do it..LOL
    -Scott -
    Reply With Quote Reply With Quote
  13. 10-21-2005 #13
    12secSS
    12secSS is offline
    Senior Tuner
    Join Date
    Jul 2004
    Posts
    1,579

    Re: I want tcc to lock at a lower speed..nothing h

    Yeah, it probably is a converter/shift point conflict causing the TCC not to lock at lower speeds. That is where the logged TCC Mode will come into play and help us determine what is possibly going on. Good luck!
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »