Help with Torqueflite 904

No this model 904 is called specifically a 904 "Baby" model due to the fact the whole box is approx 75% as large as a normal torque flight. Hence why I have been trying to ascertain components for it. I have found another 2nd hand box and a couple of firms in Australia who have used them before, but when I go hard core with the box with trans brakes etc, I need to find more information on who does this stuff and side effects etc.