sonnax
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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...- blackbeard_lives
- Thread
- 4l80e sonnax sure cure
- Replies: 12
- Forum: Engine & Drivetrain
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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...- NiamLeeSin
- Thread
- l680 sonnax towing yukon 2016
- Replies: 37
- Forum: Engine & Drivetrain
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