Is it it possible to flush the system by pulling one line from the cooler, placing the supply line in fresh fluid and the return in an empty bucket, crank the truck and let the pump do the work?
This is actually on my F250, but that forum is sometimes slow to respond, so I thought I'd put it here too.

WHY CAN'T I POST IN THE OFF TOPIC SECTION?

 

yes just make sure it doesnt spray everywhere, theres alot of PSI coming out of the lines and i learned the hard way by getting a nice ATF shower

you dont have 50 posts