[toyturbodiesel]

Transmission has breathers. Heat is the enemy, not oxygen.

 

[toyturbodiesel]

Breathers are for keeping water from entering the unit. Air moving in and out of a breather is normal as operating temps and cooling occur. I've yet to see Toyota use the term "Sealed" and why would they? Cause it's not sealed, it just doesn't have a dipstick.

 

[toyturbodiesel]

Accuracy, isn't relevant, check. 👍

 

[toyturbodiesel]

Sealed transmissions are like sealed differentials and transfer cases.

Figments of Imagination.

Sealed mayonnaise is real however.