I did it without disassembling anything. I bought a heavy duty hand held fluid extractor/pump from Autozone. I put a smaller diameter tube at the end to reach inside and kept sucking it all out, fill with cheap PS fluid, run the car turning the steering wheel, then repeat with Mobil1 automatic transmission fluid until fluid completely clear (Red).
-The metal conditioner I use is Militec1
, poured 2 oz.'s inside too. Militec1 Link:MILITEC-1 - The ONLY all-purpose synthetic metal conditioner and gun oil