Hi and thanks for using 2CarPros.
That honestly sounds like the pump is going bad. It really isn't uncommon on these vehicles. If the steering is good, it is still working, but internally it is going bad.
Here is a link that discusses possible issues:
Now, here is what I can tell you from experience. Progressively it will get louder and the pump will need replaced. However, if you replace it with a remanufactured pump, it will still make noise. I have never gotten one that didn't.
You could try flushing it to see if that helps. Here is a link that shows in general how it is done:
Here are the manufacturer's directions for doing it.
1. Make sure all other hoses are connected, then disconnect the power steering pressure hose at the steering gear.
2. Place the power steering pressure hose in a container.
3. Fill the power steering oil reservoir with MERCON(r) Multi-Purpose (ATF) Transmission Fluid XT-2-QDX or equivalent.
4. Disconnect the ignition coil wire.
5. While adding approximately 1.9 liters (0.5 gal) of fluid, turn ignition switch to the START position, and crank the engine with the starter motor. As soon as all fluid has been added, turn the ignition switch to the OFF position.
6. Connect the power steering pressure hose at the power rack and pinion steering gear.
7. Check the fluid level.
8. Crank the engine with the starter motor and add MERCON(r) Multi-Purpose (ATF) Transmission Fluid XT-2-QDX or equivalent until the level remains constant.
9. Lower vehicle and connect the ignition coil wire.
10. Start the engine and turn the steering wheel from lock-to-lock to expel any air trapped in the system. This will restore normal steering action.
If that doesn't help and you decide to replace it, here is a link that shows in general how it is done:
If the pulley needs removed, here is a link that shows in general how that is done:
Here are the specific directions for your vehicle. The attached pictures correlate with these directions.
NOTE: The power steering pump is serviced as an assembly. If any service is required the entire power steering pump assembly must be replaced.
1. Make note of radio presets and disconnect battery ground cable.
2. Drain and remove radiator coolant recovery reservoir.
3. Remove drive belt.
Part 1 Of 2
Part 2 Of 2
4. Remove power steering reservoir pump hose from between power steering pump and power steering pump reservoir. Drain fluid into a container.
5. Remove power steering pump pulley from power steering pump using Steering Pump Pulley Remover T69L-10300-B.
6. Disconnect power steering left turn pressure hose from power steering pump and drain the fluid into a container.
7. Remove three power steering pump retaining bolts and remove power steering pump.
1. Follow removal procedure in reverse order and reset radio presets.
2. Fill power steering pump with Motorcraft MERCON Multi-Purpose (ATF) Transmission Fluid XT-2-QDX or equivalent meeting Ford MERCON specification and check operation.
Let me know if this helps or if you have other questions.
Images (Click to enlarge)
Saturday, February 9th, 2019 AT 6:51 PM