Results 1 to 4 of 4

Thread: TCC Locking up in 2nd - Programming says it shouldn't!

  1. #1
    New Member
    Join Date
    Jun 2005
    Posts
    2

    Default TCC Locking up in 2nd - Programming says it shouldn't!

    I've changed the TCC functions in 3rd and 4th gear but have made no changes to 2nd gear. (the tables still read stock @ 256). Went and made some wot runs and it felt like the car was just straining early on. Logged some data and can't figure out what I found! On a wot run, everything was fine except as soon as the PCM commanded 2nd gear, it also commanded TCC enable. It then stayed enabled until the command was given for 3rd gear. What the heck! Did some regular street logging and found that TCC enable is commanded during 2nd gear all the time (3rd and 4th are working as normal) I even tried to command TCC to off in bi-directional controls - went and did a wot and got the same results?!

    Why is this?? Any chance that there is a glitch and changing my 3rd gear tables somehow corrupted something? My setup info is below.

    Mark


    402 Iron Block 1999 F body
    Built 4L60E with vacuum modulator
    3400 stall converter

  2. #2
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    Mark,
    Log the following and then post a chart image:
    TPS, RPM, VSS, ECT, MAF, MAP, GEAR, TCCDC, TCMODE, TCCSLIP, TFMDC, TFT, TSTATE0, TSTATE10, TSTATE12

  3. #3
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    Quote Originally Posted by joecar
    Mark,
    Log the following and then post a chart image:
    TPS, RPM, VSS, ECT, MAF, MAP, GEAR, TCCDC, TCMODE, TCCSLIP, TFMDC, TFT, TSTATE0, TSTATE10, TSTATE12
    Arrgghhh....
    I just remembered that you can't chart the TSTATE pids;
    for these, you would have to create a calculated pid extracting the bit from the TSTATE that we're interested in (we're interested in any TCC bits), and then you can chart these.

  4. #4
    New Member
    Join Date
    Jun 2005
    Posts
    2

    Default

    I'll collect and post up this week.

    Mark

Similar Threads

  1. TCC Locking
    By GMPX in forum 4speed RWD/FWD Transmission Tuning (incl T42)
    Replies: 9
    Last Post: July 24th, 2009, 07:22 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •