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Thread: Tables to make manual low work right on a 4L80e (GenIII) pcm

  1. #1
    Advanced Tuner Bluecat's Avatar
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    Tables to make manual low work right on a 4L80e (GenIII) pcm

    Here is where its at so HPTuners can add the missing D1 tables to the editor definitions. Standard two byte speed values (Integer/256 = mph), Standard 17 element table (vs TPS). Location is between the last of the shift speed tables but before the beginning of tcc speed tables. In the 2002 12212156 OS the table starts 4502 bytes into the transmission segment. For the 4L80e calibrations it functions as the "upshift vs tps for D1 shifter selection". I have tested it on the 2002 12212156 and 2004 12587603 OSs. There are 3 more tables right after it. I'm pretty sure the next 34 bytes are "downshift vs tps for D1 shifter selection" but I have done no testing to verify as they are all already set to 255mph on every calibrations I've looked at. It was easy to find because I knew I was looking for 22 or 23 mph from what I'd seen in the logs. All stock 80e calibrations Ive seen are 22.5mph up to 50% tps and 255mph from there on up. Set the whole table to 255mph and D1 functions as you would expect, letting you hold 1st gear until the shifter is moved out of D1. Now the values I've seen in these locations on 4L60E calibrations would still make D1 upshift early (which they don't), so there must also be a switch that controls if the ecm uses these tables or not. Reguardless having access to these tables on 80e calibrations that work that way solves the problem. The tables HPtuners currently calls D1 is either just a saftey shift table or the other side of what ever switch controls the use of the table.

    This is a must for someone wanting to be able to pedal the gas while doing a burnout, racing from a roll, or more importantly for those using a Jakes's performance trans brake where an unwanted 1>2 shift while D1 is selected will enable the brake and potentially destroy the transmission.

    I'm sure Chris can take it from here....
    Last edited by Bluecat; 07-06-2013 at 02:47 PM.

  2. #2
    Tuner in Training Gonoma's Avatar
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    Thanks I sent Chris a link to this thread. So I guess I'll have to wait til he adds the tables right? Or were you able to do it with my hptuners?

  3. #3
    Advanced Tuner Bluecat's Avatar
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    Yeah, I was doing this external of HPTuners with a binary editor. The tables will have to be added to the editor.

  4. #4
    Tuner in Training Gonoma's Avatar
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    Ok that's what I figured just thought I would ask and make sure...thanks for helping out with this

  5. #5
    Senior Tuner LSxpwrdZ's Avatar
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    Phil is the man for finding Binary!
    James Short - [email protected]
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  6. #6
    These tables are for D1 Urban Mode. I will add the tables ASAP.
    I count sheep in hex...

  7. #7
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    Quote Originally Posted by Chris@HPTuners View Post
    These tables are for D1 Urban Mode. I will add the tables ASAP.
    swwweeeeeeetttt

  8. #8
    Senior Tuner LSxpwrdZ's Avatar
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    Thanks Chris!!!
    James Short - [email protected]
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  9. #9
    Tuner in Training Gonoma's Avatar
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    I will need the beta version whenever you add the tables

  10. #10
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    No public Beta anymore, just grab latest public 2.24 release from your customer page when tables added.

  11. #11
    Tuner in Training Gonoma's Avatar
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    Ok lol

  12. #12
    I've done a few P01 OS's now 12212156 and bunch of others. Post up your OS ID's and I will prioritize those. 2.24.158 or later
    I count sheep in hex...

  13. #13
    Tuner in Training Gonoma's Avatar
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    The original OS ID was 12212156 but since I applied the 3 bar enhancement it is now 1261002 for an 01 or 02 silverado. so I'm not sure if you need both or not.

  14. #14
    Quote Originally Posted by Gonoma View Post
    The original OS ID was 12212156 but since I applied the 3 bar enhancement it is now 1261002 for an 01 or 02 silverado. so I'm not sure if you need both or not.
    download latest 2.24 and see the new table
    I count sheep in hex...

  15. #15
    Tuner in Training Gonoma's Avatar
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    Ok I was on my phone earlier but I downloaded the latest version and the table is there! Thanks for all the work blue cat and chris!

  16. #16
    Advanced Tuner Shrek's Avatar
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    Quote Originally Posted by Chris@HPTuners View Post
    I've done a few P01 OS's now 12212156 and bunch of others. Post up your OS ID's and I will prioritize those. 2.24.158 or later
    Thanks Chris ... awesome job as usual. The new table for 2002 OS12212156 looks good.

    When you have an opportunity, adding this to 2004 OS12587603 and 2005 OS12592618 would be appreciated.

  17. #17
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    I would like OS 9381344 if you could please?
    Jaime

  18. #18
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    This is exactly what I need!

    Could you update OS 9379910? Thank You!

  19. #19
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    Quote Originally Posted by ElecTech View Post
    I would like OS 9381344 if you could please?
    yes 9381344 please! just got a 4l80 installed and not being able to hold first is driving me nuts lol. i downloaded the latest 2.24.183 and dont see it
    Last edited by got-a-ls1; 08-19-2013 at 08:40 AM.

  20. #20
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    Has anyone tested this with OS12587603 yet? I can tell you that the table/parameter in EFILive does not work.