Hissing sound
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New User
Joined: Feb 2006
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From: River Falls
Hissing sound
Got a little hissing sound when I turn my steering wheel at low speeds and I get the same sound when depressing my brake pedal. I only get the brake pedal sound when truck is not moving. I get the hiss when I depress pedal to shift out of park.
Truck is a 99 early
Thanks for any help you guys may have.
Chad
Truck is a 99 early
Thanks for any help you guys may have.
Chad
Hook it, I'll pull it.
Joined: May 2007
Posts: 15,037
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From: Grand Lake, La.
Sounds to me like you hear the pump doing its thing. The power steering pump supplies power to the brake system. Make sure you put ATF in the power steering pump, NOT power steering fluid. If you did add power steering fluid, you need to do a complete flush. A good flush will always help.
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New User
Joined: Feb 2006
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From: River Falls
Just started to make this sound. Noticed that if I push brakes down hard in idle that the tac junps a few hundred rpms. Pump has ATF in it. Sounds like a vacuum leak almost. Brakes make the same sound not as loud, or as often
Hook it, I'll pull it.
Joined: May 2007
Posts: 15,037
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From: Grand Lake, La.
Can you have someone turn the wheel while you listen in front for where the sound is coming from? If it is the power steering pump, I would flush it first, before changing it out. It don't hold much fluid, so you wouldn't be out much if it is bad. No leaks?
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New User
Joined: Feb 2006
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From: River Falls
No leaks. I will have thye misses turn the wheel later when she gets home. The sound comes from straight in front of driver. Had a buddy riding in it yesterday and he gave me wtf is that when i turned the wheel. Hope I dont have to replace the pump. Would have been a lot easier to do when I did the water pump last week. Started making this sound 3 day later
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Joined: Sep 2003
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From: Houston, Texas
Sounds to me like you hear the pump doing its thing. The power steering pump supplies power to the brake system. Make sure you put ATF in the power steering pump, NOT power steering fluid. If you did add power steering fluid, you need to do a complete flush. A good flush will always help.
(insert extremely profane language here)
I've been putting power steering fluid in my resevoir for the longest time and now it's not only starting to hiss, but it's making some serious noise!!!!
Looks like a flush is in order.....
Hook it, I'll pull it.
Joined: May 2007
Posts: 15,037
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From: Grand Lake, La.
Don't feel bad, this happens quite a bit. Who in the world would put something besides Power steering fluid in the power steering pump. Yeah, its crazy.
Post Fiend
Joined: Mar 2007
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From: Texas
Just the way the system is designed. It's made to use tranny fluid in the steering / hydroboost system. Most of us switch over to a synthetic ATF when we do the flush. I didn't notice a lot of difference in steering when I did mine, but I did notice the brake pedal became more responsive at slow speeds. Almost felt too touchy for the first day until I got used to it.
Junior User
Joined: Sep 2006
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From: Watertown, WI
Would this take care of my steering issues at low speeds? If I am trying to back a trailer into a tight spot with my foot on the break, I can bearly turn the wheel?
Sorry about the hijack Chad! Sounded too interesting not to ask.
FT
Sorry about the hijack Chad! Sounded too interesting not to ask.
FT
Post Fiend
Joined: Mar 2007
Posts: 26,966
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From: Texas
I don't ever back a trailer with my foot on the brake while turning (I just push in or feather the clutch), so I've never experienced this issue, just read about it. If you've never flushed it, then I'd say it's well worth your time to do so.