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Engines & Drivetrain

Tech for the 5.3L (L83), 6.2L (L86), and 4.3L V6. Tuning and 6L80 / 8L90 transmission support.

2,740 topics in this forum

  1. Is AMSOIL ATF preferred for the 6L80E? 1 2 3

    By Marztian,   
    • 30 replies
    • 50.4k views

  2. 2014 Silverado humming sound when in 4x4

    By G5150,
    • 1 reply
    • 833 views

  3. 6L80e tq converter going out, any info on aftermarket converters?

    By 00pooterSS,
    • 9 replies
    • 6.6k views

  4. Lifted 7” now have vibration 1 2 3

    By Matt Castro,
    • 38 replies
    • 9.1k views

  5. 2014 silverado weird transmission issue

    By andrew st.aubin,
    • 6 replies
    • 1.5k views

  6. 2014 Chevy exhaust manifold bolt torque

    By Ericpipes,
    • 3 replies
    • 8.7k views

  7. Transmission Fluid & Filter 1 2

    By mcr217,
    • 16 replies
    • 16.2k views

  8. Another 6speed transmission failure at 82,000

    By aanold,
    • 13 replies
    • 3k views

  9. Warranty denied due to lift on 18 silverado 1 2 3 4 5

    By Ted_Drury,
    • 72 replies
    • 12.8k views

  10. best tune/programmer and CAI for 2017 6.2L 1 2

    By Calvin Beres,
    • 26 replies
    • 41k views

  11. By-pass trans filter upgrade for 6/8/10 speeds 1 2

    By flyingfool,
    • 16 replies
    • 3.1k views

  12. Part number for Gen V camaro trans filter

    By flyingfool,
    • 1 reply
    • 660 views

  13. When will i need new torque converter/stall 1 2 3

    By Erny415,   
    • 43 replies
    • 21.3k views

  14. Clunking driveshaft 2018 Chevrolet Silverado

    By HOGNATION_64,
    • 2 replies
    • 1.3k views

  15. Transmission reached 300F reversing trailer up a mountain 1 2

    By tiwillia,
    • 16 replies
    • 2.8k views

  16. L83 vs L86 intake, does anyone have dimensions/dyno info?

    By CXRs,
    • 1 reply
    • 1.4k views

  17. Bolt on muffler delete 1 2

    By Gonzo406,
    • 21 replies
    • 3.5k views

  18. Knock sensor

    By Mozzer,
    • 1 reply
    • 630 views

  19. Letter from GMC today re rough trans & hesitation on 6.2L engines 1 2

    By Linecapt,
    • 17 replies
    • 10.7k views

  20. LV3 disassembled engine photos

    By mmrbad,
    • 1 reply
    • 936 views

  21. E85 in non-FlexFuel 5.3 1 2

    By 6sigma,
    • 26 replies
    • 30.1k views

  22. New MRT Performance exhaust for 5.3l

    By Blueknight304,   
    • 3 replies
    • 2.3k views

  23. 2018 5.3 SILVERADO WONT START BATTERY OK

    By terry pierce,
    • 13 replies
    • 1.7k views

  24. e85 1 2

    By M1ck3y,
    • 26 replies
    • 7.1k views

  25. Trans Flush Question 1 2 3

    By Jimmah,
    • 32 replies
    • 4k views

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