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    PAS Mode for TCC Lock & Unlock?

    Unfortunately trying to search for "PAS Mode" doesn't help much.

    What exactly does PAS stand for? Trying to see if these tables are the ones that adjust TCC unlock after decel and getting back on...
  2. Gear vs. Table Axis Relationship

    All,

    I had no luck searching, but in the driver demand increasing and decreasing tables (with 8L90E trans in 2018 Sierra) it lists gears 0-9.

    I am trying to figure out how they translate to the...
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    Agreed, thanks for the link. Good idea!

    Agreed, thanks for the link. Good idea!
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    Sometimes I will stab the throttle to mark it if...

    Sometimes I will stab the throttle to mark it if Siri does not work right, which is normally the case. My daughter likes to ride with me so she texts me time stamps. Maybe after 3rd grade I can just...
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    Any update on this? I can't seem to find this...

    Any update on this? I can't seem to find this anywhere in the scanner and other posts (with more topics in the thread, that is why I replied here) indicate there is no ETA.

    This is pretty...
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    8L90E Downshift Pressures

    All,

    Why are downshift pressures on the 8L90E so high at low torque? Here is my 3-2:

    kPa 100 200 300 400 500 N m
    Pressure 511 348 200 250 300

    So below 300 Nm it starts to ramp up...
  7. FYI, for my cold hesitation issues it turned out...

    FYI, for my cold hesitation issues it turned out to be variable valve timing. I needed to reduce it until it warmed up to a little higher coolant temperature.

    I left this density multiplier as is...
  8. I have disabled DFCO without much change. Oddly...

    I have disabled DFCO without much change. Oddly enough, deep decel was never the issue. It was the light on/off throttle stuff. I think a lot also had to do with how fast it ramped up from 0% to 8%.
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    Cool, thanks. Any idea what tables they are...

    Cool, thanks. Any idea what tables they are talking about? Trying to read through the thread now...
  10. I don't have any dead pedal feel or soggy...

    I don't have any dead pedal feel or soggy feeling, not sure if you are referring to the original topic or another.

    This is about transients from negative to positive torque. After cleaning up the...
  11. Interested to see what you find here. It just did...

    Interested to see what you find here. It just did it that one time? I was tempted to bring this up to something more reasonable than 15 ft-lbs, but after tweaking some downshift times I am halfway...
  12. Sure, I am having issues on here attaching files,...

    Sure, I am having issues on here attaching files, but feel free to PM me your email.
  13. I left mine locked. I tweaked the MPH and TCC...

    I left mine locked. I tweaked the MPH and TCC apply. The factory table and feel was horrible.
  14. Thanks Russ. I will try that out. I completely...

    Thanks Russ. I will try that out. I completely missed that table with the scroll bar.
  15. I don’t have and issues outside of light...

    I don’t have and issues outside of light throttle. I was having issues in 1st and 2nd, I was able to eliminate all that with shift points and inertia, on top of driver demand.

    It seems to me they...
  16. Drivetrain "slack" feel during transients - actually driver demand issues?

    I have been dealing with the annoying things GM has done one by one. One of the last ones that is bugging me is the feel of drivetrain slop when you go from zero throttle to any throttle. Those...
  17. I actually raised some factory times because it...

    I actually raised some factory times because it felt so bad. Some of those areas hit too hard. Light throttle or reducing throttle on the 1-2 was an issue.

    The thing I hate most is the lack of...
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    What is interesting is the 2016 SOI is a bit...

    What is interesting is the 2016 SOI is a bit different from the 2018 in the area we are talking, and also at lighter loads in the RPM range.

    I wonder why? Curious how it impacts fuel economy,...
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    Are you running the stock knock sensitivity?

    Are you running the stock knock sensitivity?
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    Thanks. I am running 93, FYI.

    Thanks. I am running 93, FYI.
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    What were your stock tables set to? Also what...

    What were your stock tables set to? Also what timing?

    Here is what I have at 1600 and the respective airmass:

    0.48 0.52 0.56 0.56 0.60 0.64 0.68 airmass
    285 ...
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    No clear answer unfortunately. From what I...

    No clear answer unfortunately.

    From what I gather, the inertia and time settings - paired with adaptive parameters - get your final line pressure. I have made some line pressure changes that I...
  23. Rolling Idle RPM - Not Matching Table

    My actual rolling idle command speed is not close to matching the table in the tune at all. I do not have the tune on this PC, I will try to remember and post up later. I was curious if anyone else...
  24. Another odd thing, the fuel trims rail at +39.x%...

    Another odd thing, the fuel trims rail at +39.x% when the RPM is stable. Then when the spark changes they go back to about -0.2% and swing back to +39.

    I only saw a few times where I saw the trims...
  25. Mainly, yes. Some other areas were flat, but I...

    Mainly, yes. Some other areas were flat, but I lost speed too fast to really see.

    I was thinking maybe going in and out of DFCO, but with unlocked TCC it should disable below 1400.
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