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It's going to vary as for if the flush works or not.
1st, was the flush done with the blue label fluid or before 1st quarter 2019? because it will only count if it's blue label - which means at the earliest ...the 2nd quarter of 2019.
2nd, when did you get your flush(s) done? After you had significant shudder or right at the onset? If you wait too long, you will cause permanent damage to the torque convertor and no amount of fluid change is going to fix it.
How long is too long? Nobody really knows. If you only feel it in your gas pedal you're probably safe. If the car is shaking bad enough for passengers to notice, maybe not safe anymore.
You should really not drive the car once you start feeling the shudder (you feel tcc shudder when cruising at very low engine load at constant speed (usually in final gear)). The shudder can cause varnishing of the convertor and that's what causes perm damage. Get the fluid flush asap and you're good to go.
It really wont matter if it's in v4/v6/v8 mode. If the fluid isn't blue label and your driving habits lead to cool trans fluid a lot of the time, then it'll attract water that never evaporates out and you will eventually get tcc shudder. If v4 mode does anything, it just gives you aheads up that it's happening. I've had user selectable afm since mid 2016 and almost exclusively drive in sport mode (afm off) and still got it, with 36k miles and no trans coolers (so my fluid gets hot regularly) in relatively dry climate.
It's not a matter of if you get this.. just when since we all got the same fluid and the fluid was flawed.
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