2012+ Mazda 5 transmission oil change and addition of the tranny filter

Vasy

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2012 Mazda 5
Hope you find this helpful.
This is my second flush. Original flush was done after 25k km and the original fluid smelled like rotten garbage and was darken then night.
After swapping it to Castrol and adding an external cooler, the condition of the fluid is much improved, it no longer smells burned and is only mildly burgundy.
I'd say at this time I'll not do another flush for another 75k km at least , and will do just drain and fill yearly swapping 3.7 litters (1 gallon).
At best, I'll never have to do another flush, just drain and fill.
The extra cooler seems like really made a huge difference.

 
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