power steering problem
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Freshman User
Joined: Nov 2006
Posts: 35
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From: E.Tenn
power steering problem
just got the truck back from getting my pcm fixed where I shorted it outand now my power steering is whining. its really bad at slow speed turns. and when idling in neutral if i press the brake it whines also. from what ive searched the brakes and power steering are tied together. is the power steering pump the problem? 99 f350
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Freshman User
Joined: Nov 2006
Posts: 35
Likes: 0
From: E.Tenn
yes the fluid level is good. at first thats what i thought, my 78 4x4 f150 makes the same whine when it gets low i know it leaks, but there is no sign of leaks on the 99. is there a booster on these pumps
Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
No PS Booster but the power steering pump is also tasked with supplying the Hydo Boost for the brakes. You can try a flush and fill it may give you a little longer life.
https://www.ford-trucks.com/forums/4...steering+flush
https://www.ford-trucks.com/forums/4...steering+flush
Senior User
Joined: Jun 2005
Posts: 157
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What I did was suck out enough fluid to add a bottle of STP engine treatment. I have read on here where it might help. So far (about 2 months) the whine has not returned.
I had done a flush with syn. atf about a year before this.
I had done a flush with syn. atf about a year before this.
Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
ATF is what the pump requires as fluid. Some people get good results from putting additives in the fluid.
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Senior User
Joined: Jun 2005
Posts: 157
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Flush with syn atf first. If you still have the whine you might want to try a bottle of STP engine treatment (the honey looking stuff)
Instructions for flush here in post 9
https://www.ford-trucks.com/forums/4...steering+flush
Instructions for flush here in post 9
https://www.ford-trucks.com/forums/4...steering+flush
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