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What year / engine / model is your truck?
The fluid most likely shot out the vent hole in the cap
It can drain half the reservoir in 2 seconds if you turn the wheel with the engine off
Yours may have done it with the engine running if you were plowing heavy and cranking the wheel hard
I thought that might be the case. Coming through the vent top. Couldn't find a leak. Ran a small plow run on Friday with limited use of 4x4. Smelled it burring on engine and drop in fluid when using 4x4. I think it's spurting out in 4 wheel drive and turning. Never had an f250 with this symptom before. I searched this forum, googled to no to find an possibility. It's got another 20,000 miles under warranty with a ford protect policy afterwards till a 100,000 miles. But I dont have faith in the kids running service at the dealership. Unless I diagnoses it myself. Also I have this symptom when in 4x4 the whining noise when in 4x4. It has to be all related. Coincidence? Perhaps maybe?.
What year / engine / model is your truck?
The fluid most likely shot out the vent hole in the cap
It can drain half the reservoir in 2 seconds if you turn the wheel with the engine off
Yours may have done it with the engine running if you were plowing heavy and cranking the wheel hard
I had an older (80's) Ford that would puke power steering fluid out the res when the wheel was turned while not running. That was the only vehicle I ever owned that would do that. My 2019 doesn't, turned the wheel while off many times without any leak.
There are definitely conditions that increase preasure in the system, but not sure why that even matters, the problem is that it leaks. The source of the leak is all I would care about if it were my truck.
2022 F250 still has no rack right?
You should be able to see evidence of it shooting out the cap, if that is where it is leaking
Should have fluid from hell to breakfast, under the hood, if that is the case
The whine is the lack of fluid / air bubbles running thru the pump
A rack and pinion can store about 2 quarts of fluid in the boots before any hits the ground
The newer style ZF pumps usually will not shoot fluid out the cap
4 wheel drive should make no difference