On a 2019 GMC Yukon xl denali 6.2 10 speed Transmission - Drain and Fill, not a "Flush"?

[mike singleton]

On a 2019 GMC Yukon xl denali 6.2 10 speed Transmission - Does it sound correct that GM recommends a Drain and Fill and not a "Flush"? Does the Crossmember have to be take out? Really? Tks

 

[Big Mama]

here’s a thread.

2019 Escalade 10L80 transmission fluid change

I need to do a transmission fluid change for my 2019 Cadillac Escalade ESV. It has the 10 speed 10L80 transmission. I'm at 108K miles. I want to do this myself, but it seems to be much more difficult than I expected. I got all the parts, and a shop said they would do the pan drop/filter...

www.tahoeyukonforum.com

 

[Marky Dissod]

If the 10L80 is suffering no drivability symptoms, then a drain & refill is reasonable.
I'm sure someone knows how to push more ATF out so that more fresh ATF can be put back in vs a simple pan drop.

(How many miles? The more miles, the more badly you want a flush.)

 

[tom3]

Doing my 6L trans. every 30k miles or so and I do drop the pan, new filter and 5+ quarts of fluid. I want to see what's in the bottom of the pan and clean the magnet.

 

[NC Yukon]

Not specific to any vehicle, I've had very talented mechanics advise me to avoid flushes and to instead do frequent drain and fills. It seems they're hesitant to radically alter the environment of a properly functioning transmission. But frequent drain and fills keep the fluid fresh even if each change only results in partisl replacement.

 

[Marky Dissod]

Not specific to any vehicle, I've had very talented mechanics advise me to avoid flushes and to instead do frequent drain and fills.
It seems they're hesitant to radically alter the environment of a properly functioning transmission.
Frequent drain and fills keep the fluid fresh even if each change only results in partial replacement.

Flushes either push and/or suck ATF under pressure, plus any garbage the ATF holds in suspension, through passages that would not be exposed to such garbage during a pressure-free draining.

What everyone forgets is that it's safe to turn on the vehicle and keep it in Park for three seconds to drain out some more.