2021 GMC Sierra lifter failure
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Yes I did forget that part. That said, the older ones would still get in the 170-190F range. Not that far off from an early K2XX. -
By swathdiver · Posted
Heat is what kills them, the redesigned cooling system and that full temperature thermostat on the side of the transmission doomed them from day 1. The heat eventually causes the clutch material on the plate to flex which then breaks up and runs throughout the transmission. The GMT900s when serviced regularly, often run into the 200K mile range or more. One 6L90 in an HD3500, pulled into the shop on its own power for overhaul at 320K miles at Precision Transmission a few years ago. -
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By Grumpy Bear · Posted
Nice! And thanks for the assurance I'm helping Pepper and not hurting her. 😉 -
By Grumpy Bear · Posted
I started doing this late last year as a habit and situationally for much much longer. Coincidently I've found 1500 rpm to be my trigger point as well. It's the same sensation as a manual held in high gear at low speeds. You can feel it tearing itself apart. Don't let it! I'll add this tidbit. When on a longer run at 50-55 mph and in M5 once up to speed I tap the tow button which will hold it in 5th gear and then ask for M6 to activate the AFM. When I have to slow to a speed that will downshift I go back to M5 then tap out of tow. Smooth as butter. I still use D for Interstate work above 54 mph. If I forget, it will remind me. LOL. -
By Grumpy Bear · Posted
Thank you Phil 😉 https://uscommodityprice.com/difference-between-spot-price-futures-price/ Read the entire article but pay attention to the paragraph on 'Convergence at Expiration" and how the futures telegraphs the spot price. At delivery they are the same. Pump price responds directionally to the futures price. No they are not the same but at delivery they are indistinguishable. Good thing to or you'd be paying a thousand dollars a gallon for the stuff. There is an definitive answer with an absolute and assured result. However that answer cannot be discussed on this site. But I can say this. It is beyond the ability of any human or any group of humans no matter how well meaning. We have had thousands of years to prove we could and the results are dismal. Until then we have this: And there it is.
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