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The whining noise you hear coming from the power steering pump is one of three things. The first is more of a loud "hush" than a whine; this is the sound of fluid rushing through the bypass valve when you turn the wheel all the way to one side or the other. Sometimes the bypass valve malfunctions or doesn't open all the way, causing pressure to back up in the pump and cause your engine rpm to drop. The second and third causes result from cavitation -- vacuum pockets created behind the rotor's vane blades as a result of extremely high pump action -- or air in the lines.
this sounds like a problem with the power steering system.it could be low on power steering fluid or you have air in the system that will have to be checked for leaks as air can be sucked into the system through the area of the leak.
The brakes and the Power Steering are two different systems and two different problems. The brake problem is going to be a caliper or master cylinder issue which maybe a Vacuum issue if the Power Booster hose is leaking or disconnected from the master cylinder. The power steering is going to be low fluid in the power steering pump, faulty power steering pump (Obvious if you were hearing a whine that got louder as you turned the wheels, or the Power assist piston that connects to the tie rods.
If the fluid was completely empty, you may still have air in the system. Whining is not good. It means low fluid and could burn out the power steering pump in short order. Turn off the car, Add fluid (DON'T OVER FILL), start the car, turn the wheel a LITTLE bit right and left a couple times to get the air out. Shut off the car, recheck fluid, add and repeat until full. If you still have the whining and no Power Steering, you are FOOKED...
the fluid could be burnt and the filter may need to change. You would aslo need to check the air in your tires to see if one of the front tires is low on air, then the next thing would be to check to see if a brake caliper is sticking.
normally, the only part of your automatic transmission that will make a whining noise is the pump. it usually whines when iether the fluid is low or more commonly when the transmission oil filter is getting plugged up.
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.
This could be caused by dirty or over-aged power steering fluid, it's not flowing enough when the engine is cold (so the fluid) lack of enough fluid flowing through power steering pump can cause the power steering pump to start whining. Change the fluid and you should be good.
Hope it helps and please don't forget to rate the answer if it was helpful, it helps me, thanks!
To find out witch it is,pump or rack and pinion,break loose the presure line on the power steering pump with a wench.Start the car and turn the steering wheel back and forth,you may need to loosen the nut on the power steering hose two or three turns to get the fluid to shoot out.It should come out pretty forceful.If it doesn`t,then replace the pump.If it does come out really powerful,replace the rack and pinion.