sonnax

  1. C

    2019 MF6 10L80 valve body repair Sonnex zip kit or transgo, or mix of both.

    To anyone who has done valve body fixes or upgrades on a 10L80/90 IE sonnex zip kit 10L80-G1-10R80-ZIP or trans go SK® 10RL80-G1, which one would you go with and why? Also what would be the harm in using something in the sonnex kit that isn’t in the trans go kit or vice versa? I like that the...
  2. LSBoostedModular

    Complete parts list for 6l80e valve body upgrades

    So far I found is cs/tcc kit, o ring caps, check balls 24245720 separator plate. Anything else you guys recommend? Any info would be greatly appreciated or if there’s someone on here that sells everything needed to upgrade valve body parts. Thank you in advance. Jason
  3. B

    4l80e valve body rebuild

    3rd burned up for the previous owner of my 02 gmc 1500hd and i read that the sonnax sure cure valve body parts can prevent that from happening again so i got the drift and guide kit used off ebay and need to get my valve body fixed up, but i can't find youtubes or write-ups on how to do this...
  4. NiamLeeSin

    2016 Yukon/L680 Transmission upgrades for HD TOW 2016 Yukon XL

    Hi all, I just purchased a used 2016 Yukon with 40k miles and HD tow package to be able to pull an 7500 GVWR RV trailer. Due to all the "transmission failure" complaints here, I am worried about the transmission reliability on long trips and if it would be a good idea to upgrade the torque...

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