TH350 trans to radiator cooling lines questions

[GuyO]

There is a couple of ways to tell which is which, generally the pressure side of the transmission is the line from the front of the transmission which goes to the bottom radiator connection (The other is to start a cold engine, place in Drive for 10 seconds to activate the transmission pump and shut off the engine. The cooler of the two lines is the return line which should be the top radiator connection). The top line is the return line which goes to the back of of the transmission. Good luck. G.