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  1. M

    Any Experiences with The LuK TorCon TC0017 Torque Converter?

    The only downsides I could see are that it may have a slightly higher stall speed, because of the smaller case. Aside from that, the LUK is better in every way on paper vs a reman, even with the forged cover.
  2. M

    Any Experiences with The LuK TorCon TC0017 Torque Converter?

    slip capable material is difficult to achieve with longevity, so they generally all have good characteristics, including good static friction. I don't know of any good slippable clutch material that doesn't work well with programmed zero slip. Given that the clutch is multiplate and rated for...
  3. M

    Any Experiences with The LuK TorCon TC0017 Torque Converter?

    The LUK Torcon 6l80 converter is based on the smaller body from the 2015+ 4.8L with a welded plate, but uses a multi-plate clutch for longevity. LUK is a long time OEM quality supplier for GM. This might be the best stock replacement for the 4.8L/5.3L. All new parts, precision assembly and a...
  4. M

    2011 Yukon XL Transmission Slip

    280 km is a good run especially for 14 years of use. Most of the short term bandaid options are gone once you reach the point of heavy slip. It is very common to have apply issues on the 4-5-6 clutch (because it is small) and the 3-5-R, so that can be related to the excessive slip in 3/4...
  5. M

    2011 Yukon XL Transmission Slip

    Familyman, that is indeed unfortunate. Getting metal shavings in the fluid at only 2 years/20K miles is a pretty catastrophic sign along with the major slipping. The heavy shavings at such low miles is likely from the TCC clutch failing, but regardless those heavy shavings tend to damage the...
  6. M

    Tpms part number

    I did pull down a copy of the 12 owners manual and it does indeed say to use the trigger tool for the relearn procedure. I recommend the tool also, because it is safer and faster. However, all the trigger tool does is to trigger the sensor to send the pressure status which can also be...
  7. M

    Replacing torque converter - with what?

    The Sonnax woven carbon friction with the billet front cover plate will give a longer live and perform like OEM. I would have no issue with a torque converter rebuild with that clutch, especially for a stock replacement. Sonnax also sells the Borg-Warner high energy frictions as well, which...
  8. M

    Tpms part number

    The sensors are all 315Mhz for 2007-2014 (and 2015-2020) in the US. There are several types of aftermarket sensors: 1. OEM equivalent (like the Schrader 21507). These work just like OEM sensors. 2. OEM equivalent with cloning capability These work like OEM, but the sensor ID can be...
  9. M

    6L80 Help Needed!!!!

    The transmission pump is an offset vane drive pump just like the power steering pump, so similar sounds for problems would be expected, although I have never heard a whining 6L80 transmission pump. As Nick pointed out, the engagement for forward movement requires pressure from the pump and the...
  10. M

    6L80 Help Needed!!!!

    Agree with Nick, 200k is a good run. Time for an overhaul. Most reputable shops will replace everything to avoid future problems or a comeback. It isn't work doing a partial job. I think you can get a GM trans for a little less, and it does come with a warranty, but no real upgrades...
  11. M

    Installing "2021 PPV" style 6-Piston Brembo Front Brakes on a 2007 Yukon Denali

    Excellent! BTW, No way I could work in the garage with stylish white shoes and not cover them with dirt/grease.
  12. M

    VLOM removed from valley cover

    Also if you are deleting the VLOM solenoids, you need to block the oil pressure passage that feeds them, because they are under constant oil pressure and removing the solenoids will also cause oil pressure loss, unless you switch to a non DOD valley cover.
  13. M

    VLOM removed from valley cover

    Factory AFM/DOD is designed to provide oil pressure via the VLOM towards the DOD lifters when activated and release back-pressure from the DOD lifters when not activated. If you are disabling AFM/DOD and keeping the stock lifter you need to leave the towers unblocked so that no oil pressure...
  14. M

    New fuel pump

    Wow that is an insane amount of rust! The inability to pump fuel is almost always caused by a restriction or blockage in the vent path which goes through the EVAP canister. If you have to drop the tank for a major repair, it is a good time to flush the vent line and replace the canister...
  15. M

    Running A CVC BU60FHD Converter with Zeroed-Out Clutch Slip Target -- Any Advice/Experience?

    I have the CVC BU60FHD converter, with only 5/6 TCC lockup and zero-slip. And it works quite well. It is the best value that I know for a stock upgrade. General wisdom for 6L80 converter clutches is that the GM woven carbon clutches are the best for TCC slip, and I think that Sonnax is the...
  16. M

    Installing "2021 PPV" style 6-Piston Brembo Front Brakes on a 2007 Yukon Denali

    Yes the calipers are aluminum not composite. The 2021 GM PPV and the GM Brembo upgrade are very similar and probably functionally equivalent for most people. For 2024 it is a bolton. The outside diameter and the width of the rotor are the same. The major difference is the inside diameter...
  17. M

    Installing "2021 PPV" style 6-Piston Brembo Front Brakes on a 2007 Yukon Denali

    This thread is not about comparing all the brake upgrade options and it is certainly not an aftermarket vs oem. It is purely about retrofitting a pretty cool GM factory option, with only some minor compromises (offset fitments for caliper and/or wheels).
  18. M

    Installing "2021 PPV" style 6-Piston Brembo Front Brakes on a 2007 Yukon Denali

    The correct thread size is 10MMx1 for the 2022 PPV calipers. 3/8-24 is the metric equivalent of the about 9.525x1.058. It will still fit because the diameter is smaller and the pitch is close, but it will gall the aluminum threads on the caliper under proper tightening torque. Some the bolt...
  19. M

    TCC line pressure (vs load) causes TCC slip

    I am certain that the 2020 dual clutch is stronger (high torque holding) is a much better choice for towing. It should also work better at the same line pressure vs a single. It seems that the factory clutch material has the highest coefficient of friction in the 2% or less slip range. The...
  20. M

    RPM Fluctuation

    If it runs better with the AFM delete tune, then definitely use that one. I possibly has additional tuning for the trans.
  21. M

    TCC line pressure (vs load) causes TCC slip

    I discovered this on my 2011 Yukon 6L80 awhile back and forgot to share it. This is primarily TCC engaged in 5th gear (or possibly 6th) in the sub 2000 rpm range, with desired TCC slip of '0' (programmed not stock). At low load, the TCC line pressure has a lower threshold, effectively the...
  22. M

    RPM Fluctuation

    That is classic TCC slip. The Sonnax TCC valve will help, but I think the bigger part of the problem is the actual software logic around the way the pressure on the TCC is estimated and applied. Without going to a different converter, I think the best pseudo-fix is to increase the offset...
  23. M

    2014 Yukon XL Denali - Pre-Purchase Inspection (AWD System)

    Definitely recommend replacing all the fluids. The flywheel looks pretty dry to me. The inspection hole is wet because oil leaks drip down the outside of the bell housing to that low spot. Either from the oil cooler gasket or the oil pressure switch or both.
  24. M

    2014 Yukon XL Denali - Pre-Purchase Inspection (AWD System)

    I agree with @wjburken, they are making a note that it is AWD, because it adds to the complexity of replacing the main bearings. I suspect the oil pressure is low enough (possibly a bad pressure sensor), or maybe a failing pickup o-ring, that they would think it needs new bearings. I think it...
  25. M

    time to break up with denial…guess who. 6L80!!!

    Checkballs! Make sure you are searching for a set of checkballs on the internet! Just wanted to clarify that... :) The Sonnax zip kit includes 8 checkballs (.25") so you should be good to go. https://www.sonnax.com/parts/3505-zip-kit

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