Power steering growl. - Diesel Forum - TheDieselStop.com
'99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the '99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

 
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post #1 of 6 (permalink) Old 04-27-2017, 03:16 PM Thread Starter
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Power steering growl.

About 6 months or so, I blew one of the power steering lines, replaced it and filled it with Lucas Power Steering fluid. I has growled ever since, but now it's getting more noticeable and annoying. It even growls under brake pedal pressure.

Did I use the wrong fluid, should I flush it out.

What are the recommendations?

Thanks.
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post #2 of 6 (permalink) Old 04-27-2017, 03:55 PM
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Definitely used the wrong fluid. These trucks use ATF in the power steering circuit. Conventional power steering fluid will foam and lose pressure. You need to flush it and use either Mercon ATF or a synthetic like Mobil 1 ATF.

Watch this video:


2003 F-250 XLT Crew Cab 7.3L, Chrome BigTex Grille Guard, Quad pillar - 3 ISSPRO gauges (trans, pyro, boost) and DP-Tuner F6; Roush fuel pressure / temperature / oil pressure gauges, Ford Severe Duty AIS, 31 row 6.0 transmission cooler, ScanGauge II, Marinco mod, Walker BTM

I wonder if clouds ever look down on us and say, "Hey, look - that one is shaped like an idiot!"
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post #3 of 6 (permalink) Old 04-28-2017, 07:50 AM
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The video talks about pumping the brakes while flushing the power steering fluid. Why are the brakes effected, don't they have their own reservoir? He also comments after the flush that the brakes felt much more responsive...what am I missing??

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post #4 of 6 (permalink) Old 04-28-2017, 08:22 AM
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Originally Posted by Dennis Pitzer View Post
The video talks about pumping the brakes while flushing the power steering fluid. Why are the brakes effected, don't they have their own reservoir? He also comments after the flush that the brakes felt much more responsive...what am I missing??
The power steering pump provides fluid to the steering and the hydro boost systems.

Early '99 F250(02-98) 192,000mi,2wd,auto,Extra cab longbed,Bak Flip tonneau cover,AIS,4" turbo back exhaust,ITP regulated fuel return,SS HPX line,203 Tstat,Evans coolant,Isspro EV2 gauges on "A" pillar,John Wood HD 4R100,6.0 cooler,DP Tuner F5 chip,Terminator Scangauge

1989 F250 4x4 7.3 IDI w Banks Sidewinder turbo, 149,000 mi, Regular cab, E4OD, 8600 GVWR, 4.10 LS, Isspro EV2 gauges EGT, Trans temp, Coolant temp, Oil press, Boost press
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post #5 of 6 (permalink) Old 04-28-2017, 09:46 AM Thread Starter
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Perfect, Thanks for the Video.
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post #6 of 6 (permalink) Old 05-02-2017, 07:54 PM Thread Starter
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That was easy, and less than 45 minutes.

Quite and smooth, just like it should be.
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