I'm currently doing an ARX treatment on my 2000 Tundra with 142K miles. I'm on the first rinse phase in the engine, and put 6 ozs of ARX in the transmission and 2 ozs on the PS about 600 miles ago. I plan to flush the transmission and PS fluid after the recommended 1000 miles of cleaning. The ARX website states that there is no need to use maintenance doses after cleaning the transmission and PS system. Why is this? It seems to me that it would be a good idea. Also, why are we using only 6 ozs in the transmission and 12 ozs in the engine? In my truck, the transmission holds twice as much oil as the engine. Why are we not using twice as much ARX in the transmission as the engine? Thanks.