Been doing some reading, can't quite figure out the best way to do it. I need to know the easiest way to flush the tranny (changing to synthetic) without paying someone to do it. This is on a 97 2500 4x4 auto. Thanks!!!!

 

Disconnect the line to the cooler, slip a hose over it then into a bucket. Start the engine in N and pump it out. Best with two people so the engine can be shut down when the fluid finishes draining.
This will get most of it.