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Forum: 6 speed/8 speed RWD/FWD Transmission Tuning (incl T43, T76, T87)

6L80E, 6T40E, etc transmission tuning, incl T43 & T76 TCM. Not Allison.

  1. Sticky Thread Sticky: Improving shifts via the ECM

    Started by GMPX, March 11th, 2012
    16 Pages •
    1 2 3 ... 16
    20 Attachment(s)
    • Replies: 153
    • Views: 286,043
    hsv084
    July 1st, 2022 Go to last post

  2. Sticky Thread Sticky: 6L80 Reference Material

    Started by joecar, February 21st, 2014
    3 Pages •
    1 2 3
    10 Attachment(s)
    • Replies: 20
    • Views: 74,144
    joecar
    March 31st, 2021 Go to last post

  3. Sticky Thread Sticky: T43/E38 6L90 Shift points change

    Started by 55chevdelray, May 20th, 2013
    3 Pages •
    1 2 3
    6 Attachment(s)
    • Replies: 28
    • Views: 87,493
    joecar
    September 16th, 2020 Go to last post

  4. Sticky Thread Sticky: DIfferent T43 question, can't change OS?

    Started by 02CCSB, January 19th, 2016
    2 Pages •
    1 2
    • Replies: 14
    • Views: 44,844
    auspeed
    December 11th, 2016 Go to last post

  1. Skipping gears on purpose 6L90

    Started by truethinker, January 31st, 2026
    1 Attachment(s)
    • Replies: 2
    • Views: 9,577
    truethinker
    February 4th, 2026 Go to last post

  2. Looking for T76 Stock File OS 24265790

    Started by Brody, August 7th, 2025
    • Replies: 0
    • Views: 3,747
    Brody
    August 7th, 2025 Go to last post

  3. Need a stock file for 17 1500 t43

    Started by Cwalt50, May 1st, 2025
    1 Attachment(s)
    • Replies: 2
    • Views: 3,265
    Cwalt50
    May 2nd, 2025 Go to last post

  4. Request t43 os 24254909

    Started by 11tahoe, February 13th, 2025
    3 Attachment(s)
    • Replies: 8
    • Views: 4,098
    11tahoe
    February 14th, 2025 Go to last post

  5. T87 Not supported

    Started by Schwanke Engines, December 6th, 2024
    • Replies: 5
    • Views: 2,291
    nonnieselman
    December 9th, 2024 Go to last post

  6. Stock tune

    Started by Cougar281, December 5th, 2024
    2 Attachment(s)
    • Replies: 4
    • Views: 1,857
    nonnieselman
    December 6th, 2024 Go to last post

  7. 6L90E shuddering when converter locked and under load

    Started by Jim_PA, January 21st, 2015
    2 Pages •
    1 2
    4 Attachment(s)
    • Replies: 16
    • Views: 19,106
    Dave_villa
    October 19th, 2024 Go to last post

  8. Need to verify stock tune for new TCM

    Started by TorqueMonster007, September 3rd, 2021
    2 Attachment(s)
    • Replies: 4
    • Views: 13,344
    nonnieselman
    June 21st, 2024 Go to last post

  9. Torque Coefficent Table on E86B

    Started by jakezed22, July 6th, 2022
    • Replies: 1
    • Views: 5,183
    jakezed22
    May 12th, 2024 Go to last post

  10. l98 6l80e conversion help

    Started by JCA, February 27th, 2024
    2 Attachment(s)
    • Replies: 3
    • Views: 5,019
    Tre-Cool
    February 28th, 2024 Go to last post

  11. 6l80e help with TUTD holding gear

    Started by wallyman424, February 25th, 2024
    3 Pages •
    1 2 3
    4 Attachment(s)
    • Replies: 20
    • Views: 12,563
    Tre-Cool
    February 28th, 2024 Go to last post

  12. Revision, 6l80e will not rev past 5k in gear, no up-shift at wot.

    Started by undergroundak, March 14th, 2013
    1 Attachment(s)
    • Replies: 4
    • Views: 8,535
    nonnieselman
    February 19th, 2024 Go to last post

  13. 2011 t43 6l80 file

    Started by Sass5150, January 26th, 2024
    • Replies: 0
    • Views: 3,164
    Sass5150
    January 26th, 2024 Go to last post

  14. T43 to E67 Comms

    Started by oondy, December 16th, 2023
    • Replies: 0
    • Views: 3,172
    oondy
    December 16th, 2023 Go to last post

  15. 6L80E T43 Link.ini

    Started by RC1, November 18th, 2023
    • Replies: 0
    • Views: 3,743
    RC1
    November 18th, 2023 Go to last post

  16. Weird shift flare T76

    Started by pinstripebob, July 3rd, 2023
    2 Attachment(s)
    • Replies: 2
    • Views: 4,991
    pinstripebob
    July 5th, 2023 Go to last post

  17. 2015-2019 HD 6l90e manual mode tuning

    Started by jakej03, June 10th, 2023
    • Replies: 3
    • Views: 4,327
    nonnieselman
    June 22nd, 2023 Go to last post

  18. ve ss reducing power

    Started by turbo, November 5th, 2022
    1 Attachment(s)
    • Replies: 3
    • Views: 6,221
    turbo
    November 14th, 2022 Go to last post

  19. 2800 stall converter 6L80e

    Started by turbo, October 28th, 2022
    1 Attachment(s)
    • Replies: 2
    • Views: 5,392
    turbo
    November 5th, 2022 Go to last post

  20. Please share any T43 24264923 OS

    Started by jakezed22, September 24th, 2022
    • Replies: 0
    • Views: 4,106
    jakezed22
    September 24th, 2022 Go to last post
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