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  1. Geotrash

    6L80 video for 1000+ hp

    That's the main reason. We have lots of rolling hills here as we work our way up on, and back down from the Piedmont for the Appalachians. If I didn't keep it in 4th, I'd be up or downshifting every 20-30 seconds or so. If I'm on a long flat section where I know I can easily hold 5th at modest...
  2. Geotrash

    Yet another Yukon with engine tick and low oil pressure

    Sounds normal to me. Maybe a bit of lifter clatter, but nothing to worry about. Here's mine 25K ago after the cam swap. Sounded very similar prior to any cam work:
  3. Geotrash

    6L80 video for 1000+ hp

    You past guidance has changed the way I operate my 6L80 when towing heavy as well. I now run it in 4th @ 65mph on the highway all day long.
  4. Geotrash

    Transmission (TBV) thermostat

    The 2014 6L80 does not have a thermostat. That was added for the 2015 model year.
  5. Geotrash

    Oil leak rear main seal maybe????

    All great insight here, and I'll add one more piece. *If* you decide to either have a shop do this or tackle it yourself, spend the extra $500 to have a new torque converter with a billet cover installed on the transmission. Oh, and have them replace the oil gallery barbell, too. Should be about...
  6. Geotrash

    Oil leak rear main seal maybe????

    You must be in California or someplace else warm - that thing is clean! +1 on checking the oil cooler block-off plate above the oil filter. Common leak spot.
  7. Geotrash

    2007 yukon loss of power

    Rotten egg smell can mean that the catalysts are either not working effectively or they're being overwhelmed with fuel. Given that you're experiencing a loss of power, I suspect either a misfire condition, plugged catalytic converter(s), a fuel delivery problem or an air metering problem. I'm...
  8. Geotrash

    Yet another Yukon with engine tick and low oil pressure

    What a bummer! For what it's worth, the first time I replaced the o-ring on my '12 Yukon XL Denali, I ended up with lower oil pressure than when I started as well, but I was also doing a cam swap at the time so who knows what went wrong. I went back in with a new Melling high volume pump and the...
  9. Geotrash

    Upgraded to a 2021 Escalade

    Congrats! You can easily run that thing another 12 years to match your Tahoe's 15 years.
  10. Geotrash

    Need help figuring out why in my 2011 5.3 Tahoe spark plug #7 keeps getting oil on thread

    There are valve stem seals and there is a valve cover gasket. Hope that helps.
  11. Geotrash

    Maintenance Log app

    I use the CARFAX app. They have the maintenance from most shops already there and they allow you to add your own, including receipts for the parts.
  12. Geotrash

    Broken Motor Mounts

    Yeah, it's not like I'm going to seek out the chance to do that job again! :peace:
  13. Geotrash

    Burning Smell Outside and Middle of Yukon

    Are you saying that it has or has not reproduced the smell? It seems that your 2 statements conflict so I just wanted to make sure all is well.
  14. Geotrash

    Is this a crazy idea to cool my 4L60E transmission?

    I wasn't trying to be argumentative. You quoted the OP so I thought maybe you were responding to him. Didn't mean to offend you, truly. Just hoping the info I shared above is helpful.
  15. Geotrash

    Plugs and wires

    I've been running NGK 7397 Iridium plugs purchased from Rock Auto in my '07 for the last 45K. Runs great, no problems. IIRC, NGK is the OE mfr for ACDelco plugs.
  16. Geotrash

    Is this a crazy idea to cool my 4L60E transmission?

    From the GM chassis manual: Also, if it's helpful specific to the 6L80: In the February 2011 issue of Trailer Life magazine RV Clinic in response to a reader about the maximum transmission temperature allowed in a 2009 Chevy Silverado, the Tech Team had this response. “General Motors’...
  17. Geotrash

    Is this a crazy idea to cool my 4L60E transmission?

    Who are you talking to?
  18. Geotrash

    Is this a crazy idea to cool my 4L60E transmission?

    It's a good idea but I would want it to open at 150ºF, not 180. A similar valve is stock on the 2015+ rigs and they've had heat-related transmission problems as a result. The problem is that in really hot weather, either with a rig full of people and stuff, or when towing, you have less thermal...
  19. Geotrash

    Is this a crazy idea to cool my 4L60E transmission?

    I did this on my '12 XL Denali with a Derale 13960 and it didn't work out. The fluid-to-air cooling method is far less efficient than water-to-fluid so I was getting spikes to 265ºF towing our 7K lb camper over the Blue Ridge mountains. I plumbed the radiator end tank cooler back into the loop...
  20. Geotrash

    Steering Resistance - What to Replace?

    That's plausible to me. It's a pretty easy job ion you have an impact wrench. Rock Auto has the best prices on new that I've found.
  21. Geotrash

    Accessory Drive Belt Maintenance?

    Book maintenance interval is 100K. I change mine every 50K or whenever I have to remove it for something.
  22. Geotrash

    Bought core block

    You can probably buy a new crank with the right reluctor wheel from Summit. I believe there is also a company that makes a converter box for the signals to convert them to the newer standard. Might be worth a Google search to see it you can find such a beast if needed.
  23. Geotrash

    Broken Motor Mounts

    Fortunately, there are other suppliers out there of mounts for these of various materials, including poly.
  24. Geotrash

    Stunned!! Denali 6.2 spun a rod bearing at 25k..

    And may you enjoy many years and at least 250K trouble free miles behind the wheel.
  25. Geotrash

    2007 Yukon. Lost 1st and reverse gears in transmission. Replacement options?

    +1. If it's an '07 Yukon Denali then it has the 6L80. Yes, Im sure. :)

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