I am in the process of changing the ATF in my wife's '03 H6 sedan.

 

I have located the rubber lines attached to the ATF cooler at the bottom of the radiator.

 

I want to use those lines to flush the remaining old ATF from the transmission.

 

My question is which line flows ATF from the tranny to the cooler (the line on the driver's side or the line on the passenger's side)?

You can check this thread...it may be helpful although the year of that car is different, maybe the lines are the same way.

 

http://www.ultimatesubaru.org/forum/showthread.php?t=6381

Unfortunately, there's no top and no bottom line. They're situated right and left.

Chip

Have a look in the left hand front fender just beside the battery , right inside the fender just behind the headlight

Thats where it is on an 05 model ,just can't remember if it's the same on a 03 H6

 

SEA#3