Gearbox oil how do i change or top up gearbox oil on a Mazda Bongo automatic, as i want to put in a longer lasting wynns tpe oil.. for a longer gearbox life

There is a pan at the bottom of the transmission that you can drain the fluid from.... you'll need to get a new gasket and it's a good idea to change the filter at the same time. usually you can buy that in a kit that includes both... most automatics don't have a drain hole. but be aware that you have to make sure that that is the correct transmission fluid for the tranny.
also realize that draining the pan and changing the filter is good maintenance but there is still a large amount of flud in the torque converter and transmission cooler.

I'm not sure how advisable it would be to mix the two types of fluid

changing the filter might be a better option... also when you do that there is a small magnet in the pan ... it catches any small metalic flakes as the bands wear.
and while you have the pan off you can adjust the bands... you'll need a manual to make suire that is done properly... that is if that transmission requires adjustment.... as far as i know the new electronic transmissions don't need to be adjusted.


Robert

There should be two identical looking bolt heads or plugs that you can put a 3/8 extension into. with style lower one of the two is the drain plug and the higher one is the fill port. hope this helps you.