AW4 Cooling Line Differences
 

Just out of curiosity does anyone know why the output from the transmission ( hot side) on the older models enters the radiator at the top while the output side enters the bottom of the radiator on the later models?
I was recently comparing a 1990 vs a 2001.

If you're looking at the FSM, I believe it has them labelled backwards in one of the drawings. It makes sense to fill from the bottom so it doesn't trap air in the cooler.

I was comparing the actual as installed line placement.