ok all I have read a number of posts and most of them deal with the 5.4L engine. well I have a 4.6L and an automatic trans. This is my Daily Driver. however I also use it for Towing on weekends. I have the factory Tow package and I am towing about 8000lbs give or take a few. I picked up some nice small aux trans coolers at the pick and pull for less than 5.00 and a mount to mount them in series. I hear all sorts of stuff about fluid press. and all that. What is the normal Press the trans fluid runs at? Would I need an Aux oil pump.