Jump to content

6.6L Gas V8 (L8T)

The iron-block workhorse. Tech and reliability discussion for the 6.6L L8T V8 and the 6-speed / 10-speed heavy-duty transmissions.

254 topics in this forum

  1. Normal L8T noises? 1 2 3

    By BuckWallace,
    • 36 replies
    • 12.7k views

  2. Transmission slips when offroad

    By Cindy Wood,
    • 13 replies
    • 2.7k views

  3. 2020 Silverado 2500 HD

    By Trey249,
    • 0 replies
    • 1.4k views

  4. Edge CTS3

    By Gregg Staples,
    • 8 replies
    • 3.3k views

  5. 6.6L gasser MPG with new 10 speed Allison tranmission? 1 2 3 4 5

    By campah,
    • 62 replies
    • 37.8k views

  6. 6.6L gas, will it disappoint?? 1 2

    By kylant,
    • 25 replies
    • 8.4k views

  7. E85 Option

    By C/K Man,
    • 1 reply
    • 2.8k views

  8. To Dipstick or NOT To Dipstick The 6 Speed Trans

    By SoCal Angler,
    • 6 replies
    • 3.7k views

  9. MPG at 600 miles 1 2

    By 2021 HD,
    • 22 replies
    • 6.2k views

  10. Mobil 1 - Which Flavor for Towing...ESP, Truck/SUV, AFS?

    By SoCal Angler,
    • 10 replies
    • 4.5k views

  11. Towing AFTER First 500 miles...Oil Change?

    By SoCal Angler,
    • 2 replies
    • 4.6k views

  12. Camper towing report after 3200 miles 1 2 3

    By UWSkier,
    • 31 replies
    • 16.2k views

  13. Cameras and trailering app help

    By Tfkkolar,
    • 1 reply
    • 2k views

  14. 2023 GMC Sierra 3500HD 6.6L Gas/6 Speed - Trans Temps? 1 2 3

    By SoCal Angler,
    • 44 replies
    • 10.4k views

  15. Squeak/squeal when shifting?

    By BuckWallace,
    • 13 replies
    • 8.4k views

  16. 2021 Silverado 2500 HD review

    By MacLaren,
    • 0 replies
    • 3.4k views

  17. S&B Cold Air Intake

    By MacLaren,
    • 2 replies
    • 2.5k views

  18. Best Cold Air Inatke 6.6 Gasser

    By MacLaren,
    • 5 replies
    • 4.7k views

  19. 2024 2500 transmission leak 1 2 3 4

    By stympyctlan,
    • 45 replies
    • 29.6k views

  20. Trading 7.3 (Godzilla) for G.M.C gas

    By lsttype,
    • 12 replies
    • 20.7k views

  21. 2023 6.6L gas single exit black tip cat back system 1 2

    By reb0957,
    • 17 replies
    • 8.5k views

  22. GM Truck HD New Engine Next Gen

    By Red Armor Oil,
    • 3 replies
    • 2.4k views

  23. 2024 Gasser/Allison First Tow Report 1 2

    By the8rotor,
    • 20 replies
    • 15k views

  24. Perhaps I have missed this in prior conversations concerning the 10 speed behind the gasser. 1 2

    By Jettech1,
    • 23 replies
    • 13.4k views

  25. Here's a great video with the new 10 speed behind the gasser towing a 15k fifth wheel. I'm impressed! 1 2 3

    By Jettech1,
    • 39 replies
    • 7.8k views
×
×
  • Create New...