Search results

Search the forum Search Articles
  1. J

    Converter or ECM problem?

    Going to look at the EBCM. To confuse things further - I can activate cruise with the converter locked in 6th and then deactivate, the converter stays locked when I lift - like it should.
  2. J

    Converter or ECM problem?

    Matched when locked and wasn't erratic. I never compared to another truck though. What should the readings be?
  3. J

    Converter or ECM problem?

    >100k V2 and Tech2 emulator via MDI. I agree that it's a speed problem. A40 (LMM) in it now and unlocks converter and doesn't shift into 1st until stopped for 2-3 seconds. It seems as if the trans "lets go" in between upshifts(flares). Turbine speed and output speed look normal, TCCM...
  4. J

    Converter or ECM problem?

    $250 check payable to the person that can successfully solve this issue.
  5. J

    Converter or ECM problem?

    Ok, A40 LBZ TCM fixes the problem!! But, creates more problems as well. The converter locks HARD, I'm guessing this because of the absence of the engine speed sensor? Also, tow/haul and tap shift don't work. With the A40 from an LMM the trans unlocks the converter (same problem) and doesn't...
  6. J

    Converter or ECM problem?

    Replaced. Logged and traced wires to ECM and TCM to confirm brake status - checked out OK.
  7. J

    Converter or ECM problem?

    Just logged turbine speed and it looked good, no funky readings. Returned to 0 when stopped in gear. I'll switch back to the A40 and check it. :(
  8. J

    Converter or ECM problem?

    I'll put the A40 back in. With the A40 it doesn't downshift into 1st until I've been stopped for 2+ seconds. Do you have a list of speedo PIDS I can try? The PIDS I tried were all ok. I transplanted a transfer case - is there a speed sensor on the T-case?
  9. J

    Converter or ECM problem?

    I'm a big boy, no disrespect taken. I'm not asking for anything for free - I'll gladly reimburse someone for their time. I have a problem and I'm looking for a solution, no emotion involved.
  10. J

    Converter or ECM problem?

    Thanks for the help! It's always nice to obtain assistance from humble members. I never claimed I knew everything, if I'm wrong about the "data" wire then I'm wrong - it won't be the last time. That's why I came here for help. A trustworthy wiring engineer informed me that that the TCC had a...
  11. J

    Converter or ECM problem?

    Well that might be a problem considering this is a suburban? Would it have even had one? Came with 6.0 and 6L80E with tap shift.
  12. J

    Converter or ECM problem?

    I'm so burned out on this thing I'm talking in circles. What I mean is I have checked 100% of the wiring from the brake switch, ECM, BCM, etc.. Something is commanding it to unlock - I've logged/monitored every PID with EFI. I'm guessing at this point it has to be the data wire since that...
  13. J

    Converter or ECM problem?

    Any position. I agree, but all data shows VSS signal ok. Not a problem locking - unlocking is the problem. LMM locks converter via canbus I think thats where the problem lies. I have a U0117 PTO code but the vehicle doesn't have a PTO.
  14. J

    Converter or ECM problem?

    Hello, I'm looking for some help, I have a 2008 Duramax Suburban (2008 LMM powertrain) and my converter unlocks as soon as I lift - no matter the condition, even in T/H. When we finished the project the trans would not downshift into 1st until the vehicle was completely stopped for 2-3 seconds...
Top Bottom