Thank you sir, this explains and answers alot of my questions.
#6l90e torque converter full
The owner found a 2017 4wd 6L80E on "Offer-up" for $800 & I converted it to 2wd using the old output shaft & extension housing.ģ.The Thermostatic Cooler Bypass Valve guts, Yep.The cooler is full of metal!!Ĥ.Valve Body, More metal.No sense in opening it up.Ħ.Burnt 4-5-6 Clutch.Look at the top of that filter! Here's some pictures of a 6L80E out of a 2015 Silverado 1500 2wd with 150,000 miles that never towed heavy.Not many usable parts were left! Though I was able to save the TCM/Solenoid pack with a good cleaning (Thank you GM for installing filters/screens between the Valve Body & TCM/Solenoids!) Interesting fact.The TCC clutch lining on the 80E & 90E is smaller in diameter than the lowly 300mm 4L60E & quite a bit smaller than a 4L80E. Sure, 17-30 RPM isn't much differential slip but accumulated over 200,000 miles can result in a worn TCC clutch lining! I highly recommend tuning the TCM to eliminate the PWM apply of the Torque Converter Clutch in heavy duty applications, After many hours of data logging these.The programming allows the TCC to slip on a constant basis. Delayed engagement, And hard shifts are also symptoms of this failure. The most common issue on the late model 6L80E/6L90E is the TCC clutch lining wears down to the point in goes "Metal to Metal", This metal gets circulated throughout the unit clogging the filter causing reduction in line pressure.The first clutch pack to let go is the 4-5-6 clutch. Why? Did he have a problem as well or is he going to chew me on the maintenance lol.
More work than a simple pan drop (and still requires a pan drop at that). Or one could elect to run to the end of the fluid's lifespan, and then have to do a full oil exchange, which likely is more work (pulling cooler lines, pumping fluid through, etc). I'm not sure he's saying that it's needed every other oil change-just that, if one wanted the easy way out, just change half the fluid that often, and it'll simply never be in there long enough to get dirty. If a drain and fill is required during every oil change for any transmission this means GM makes dung and does not deserve anyone's business and should close up now. Just because it's common for a transmission to go beyond this does not equal it's a expectation. 200K miles is a lifetime for any automatic transmission. Mike I have to disagree there was no murder committed. You can do a pan drop and filter swap every 10,000 miles and never have dirty fluid. The complete 6L90E system holds 12.4 quarts. If you drain the pan you get about 6.5 quarts out. The beauty is they have a drain plug and the pan is easy to drop.
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