this goes for new and old auto tranny's i guess. How does the fluid circulate through the transmission to the radiator and back. Is there some form of mechanical pump in the tranny or do the tuning of the gears force it through? kind of curious as to that. thanks

 

Most Ford transmissions only have a front pump. It is driven at engine speed by the converter housing. It pumps oil to the converter and cooler. The pump is right behind the converter and its the piece that holds all the other stuff inside the case. #4 on figure 102. Its an interesting type of pump on most older transmissions. Its a gear type, there are two gears meshed together, as they rotate the fluid is pulled infrom one side, driven around the housing, and where the gears mesh back together it is shoved back into the transmission under pressure. one gear is smaller than the other, and on some models there is a spacer cast into the pump housing that takes up the space and helps move the fluid.


The color pic is a pump with the rear half removed. You can see the areas where the fluid is moved from one side to the other, so you should be able to see how it works.