Question about 2007 Jeep Wrangler Unlimited Rubicon 2 Doors

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Power steering pump whines at first start up of the day.

If the vehicle sits for about six hours or longer, the power steering pump will whine momentarily when you start the vehicle.

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This is common with many cars due to the hydraulic fluid being cold and causing the pump to moan/whine for a short time as it's working harder to move the fluid as it's thicker until it gets a little heat into it; this will be more pronounced on a very cold or freezing day. Any noise when the pump has warmed up is another issue entirely.

Posted on Jan 11, 2009

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Posted on Jan 02, 2017

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1 Answer

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hi robin.
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the power steering pump will also make a whining noise too.

turn the wheel all the way to the right and hold steady pressure against the stop. this puts maximum force on the power steering pump and, if the power steering pump is the one making the whine, it will change the sound of it. (usually louder).

if the trans pump is making the whine noise, it should sound different in neutral compared to drive. this test will really only work if it make the noise without the vehicle moving. if it wont do it at idle hold the rpms at 2000 or so.

if you decide the noise is coming from the transmission, and the transmission filter has not been replaced (assuming you installed a used transmission), replace the filter by removing the oil pan.



oh and also, if it is the power steering pump you should be able to make it make the whining noise while the vehicle is stationary. if it wont make noise unless its moving its not the power steering pump.

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1 Answer

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A power steering pump will whine if it is low on fluid, when you turn the wheels you will hear the whine or if the power steering belt is to tight you will also hear the whine. You will not hear this whine when the truck is stopped.

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1 Answer

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