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Has anyone been able to find the procedure to change the power steering fluid in a 2021+ super duty. I specifically have the 7.3.
Trying to find some instructions/vid on the procedure before I take a crack. Little different with the 21+ since the reservoir has a screen etc.
Thanks!
Behind left fender liner, pump lower hose. Pop it off to drain. Refill with front wheels off ground. Cycle steering back and forth. Might have to do it a couple times to cycle all fluid out.
Oddity, iirc, its Mercon LV ATF.
Last edited by Midwest87; Mar 15, 2026 at 10:07 AM.
What I did was remove the smaller hose off the reservoir (small hose connected to cooler) attached some vinyl tubing to that hose and directly the fluid to a catch pan. I plugged the hole in the reservoir with some kinked vinyl tubing.
Turned the wheels locked to locked on cardboard and cycled a little more than 3 quarts of motorcraft LV ATF thru the cycle keeping fluid in the reservoir.
Will say it will probably be easier to rotate the tires in the air rather than cardboard.
Last edited by BuiltTough45; Mar 15, 2026 at 03:41 PM.
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