Well - there is a problem with that. Its localized boiling. If you have a non turbo car then you can use the regular prestone. (See update below)Prestone is an OAT technology (Organic acid technology) coolant. A Hybrid OAT (a mix of oat and other ingredients )is called a HOAT- Hybrid OAT. A HOAT is...

Is Valvoline Zeex G-05 only HOAT technology coolant in the aftermarket?

So, removing the oil pane (atf chamber) while flushing the gearbox is best to get rid of particules since the filter is not accessible? Am I right?

The filter is inside but is not accessible without a full teardown. Filters on a high percentage of late model vehicles are strainers to prevent the fluid pump from picking up particles large enough to be a problem. The filtration is actually by letting the particles settle to bottom of gearbox nea...