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About gammey4

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    Tuning Guru

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  1. Camaro SS 6L80 Trans Tuning

    Post your log, tune, channels (make sure your logging trans gear) when you get a chance.
  2. Camaro SS 6L80 Trans Tuning

    I can help you out Saturday after work. I’m at work right now so I can’t see your tune and don’t remember every table off the top of my head.
  3. Auto trans...adapt values

    Maf disconnected won’t cause a limp mode. I run my truck in speed density, have for years.
  4. Auto trans...adapt values

    The tcm uses calculated load, tps, vehicle mph, input shaft rpm, to calculate when to shift. If you want to rule out the maf, take off the air intake tube and force it into speed density mode. Don’t just unplug the sensor, it still needs it for intake air temperature. If it’s unplugged it will default to -32 degrees (or somewhere around there) and run like crap. If your maf was that far out you would see it in your fuel trims.
  5. Auto trans...adapt values

    What’s the year/model truck? I can post the trans files if you want to see them
  6. Auto trans...adapt values

    The tcm uses rpm, input and output shaft speeds, to determine when a shift has completed. How would the tcm expect a rpm increase when shifting 2 to 3? And the snap on is using a generic pid to display a value. A generic pid will displace a value from anything without really looking into the specific math behind it.
  7. Auto trans...adapt values

    You answered your own question. Unless it was shifting faster than commanded it wouldn’t reduce pressure. The logic is pretty simple, slower shift than commanded add pressure, faster take away. Your snap on is wrong. And I know you being an actual mechanic you verified real pressures with a gauge and aren’t solely relying on the sensors. That would have already told you that you have a leak in the third gear circuit most likely.
  8. Auto trans...adapt values

    Yes. Shift adaptive values are a percentage to multiply against the pressure control solenoid current. So a negative 15 would reduce the current to the solenoid, thus increasing line pressure. In a “limp mode” scenario do you think gm would want max pressure or none?
  9. Auto trans...adapt values

    They do. What’s confusing?
  10. Auto trans...adapt values

    Negative numbers actually indicate it’s trying to raise pressure, not lower it.
  11. Union Hill 2018 thread

    I’d really like to get my truck out there again.
  12. 2010 Camaro SS

    If the trans tune is the same, tap shift should have been left stock. Your early shifting can be fixed easily, but the ecm will use both mph and rpm to figure out when to shift. Don’t just blindly add rpm to the shift points to try and fix it. Look at your logs and determine if it’s shifting off mph or rpm when it’s shifting. I believe your shift rpm’s are set to 6200, I’d bet it’s mph.
  13. NewER DD 2015 Mustang GT

    I’d like to dyno my truck just to see where it’s at.
  14. Auto trans...adapt values

    Just like fuel trims, commanded vs actual.
  15. Random thought thread

    John I’ve been out of the loop for awhile now, but what problems are you having? Work/Army has kept me retarded busy over the last two months. Send me a text if you still have my number.