Squeak when turning steering wheel at low speed

Can be an bad serpentine. That make to slip and make that sound. Good luck.

i would say it is a solenoid or air in the power steering lines but you would have to put a obd2 scanner and see what it says.
if i remember correct bleeding is as simple as removing the power steering cap and turning steering all the way left hold for 5 seconds then right and hold but you will need to look at oil in reservoir and see if it is bubbling while turning and holding. you will need a helper and if it is do this for 5-10 minutes.

Squeaking CV Axle bearings... Bad CV axles are expected to click but they can also on rare occasions squeak... I know because I had that experience with a 1984 Sentra when doing a U or close turn only. Other parts that could theorically squeak at low speed, and depending on the condition and brake pad material.. would be warped disks or glazed brake pads... but at low turning speed, the CV Axle is more likely.

could be wheel bearing ,could be cv joint could possably be bushings in suspenion.

This car is essentailly the same as the Lincoln LS & T-Bird.
Here is their solution.

please rate if this helps you. Thanks.

ISSUE: Some 2003-2005 Thunderbird, Aviator, and Lincoln LS vehicles may exhibit steering gear squeak when turning the steering wheel, especially during low speed parking maneuvers. The noise may sound like it is coming from the steering column area and may be felt as a roughness in the steering wheel, while turning.
ACTION: Refer to the following Service Procedure.
SERVICE PROCEDURE NOTE: USE ONLY THE FLUID AND ADDITIVE SPECIFIED IN THIS ARTICLE. USING ANY OTHER FLUIDS OR ADDITIVES MAY RESULT IN SEAL DETERIORATION AND LEAKS.

1. Open the hood and remove the power steering reservoir cap.
2. Raise the vehicle on a hoist. Refer to Workshop Manual, Section 100-00.
3. With engine off, drain power steering fluid by disconnecting steering lines and clamp plate from steering gear. Refer to Steering Gear Removal and Installation procedure in Workshop Manual, Section 211-00, follow only the steps required to disconnect the steering lines.
4. Turn steering wheel lock-to-lock to drain fluid completely.
5. Reconnect steering lines and clamp plate to steering gear. Torque retainer to 15 N-m (11 lb-ft) for Lincoln LS and Thunderbird, torque to 25 N-m (18 lb-ft) for Aviator.
6. Lower vehicle.
7. In a clean container mix 50 ml (10 teaspoons or 1.7 oz.) of Motorcraft Additive Friction Modifier, Part Number XL-3, with 50 ml of Motorcraft MERCON® Multi-Purpose Automatic Transmission Fluid, Part Number XT-2-QDX. NOTE: DO NOT PERFORM STEPS 8 AND 9 ON A HOT VEHICLE.
   
8. Pour the above mixture into the power steering reservoir.
9. Top off (fill) the power steering system with Motorcraft MERCON® Multi-Purpose Automatic Transmission Fluid, Part Number XT-2-QDX and reinstall the power steering reservoir cap.
10. Raise vehicle on hoist enough so the front wheels are off the ground and can be turned from lock-to-lock.
11. Start the engine and keep it at idle. Remain inside of the vehicle.
12. Slowly cycle the steering wheel from lock-to-lock for two (2) minutes.
13. Quickly and forcefully turn the steering wheel in one direction to full lock (either side). Bounce the steering wheel on/off of full lock twenty (20) times forcefully. NOTE: IT IS CRITICAL THAT THE STEERING WHEEL IS TURNED QUICKLY AND FORCEFULLY IN ORDER TO CREATE A PRESSURE SPIKE IN THE POWER STEERING SYSTEM.
    
14. Repeat Step 13 in the other direction. Return the steering wheel to on center position.
15. Slowly turn steering wheel to full lock in one direction (either direction) to achieve maximum pump pressure. Hold at full lock for one (1) second, then turn the steering wheel back 90 degrees as quickly as possible. Repeat this procedure twenty (20) times. NOTE: DO NOT HOLD THE STEERING WHEEL AGAINST THE STOPS FOR MORE THAN THREE TO FIVE (3-5) SECONDS AT A TIME. DAMAGE TO THE POWER STEERING PUMP MAY OCCUR.
    
16. Repeat Step 15 in the other direction.
17. Cycle the steering wheel slowly for 1 minute to confirm that the squeak is corrected and return vehicle to the customer. NOTE: IF THE SQUEAK CONTINUES, REPEAT STEPS 13-16 ONE ADDITIONAL TIME. IF THE SQUEAK IS STILL NOT CORRECTED PROCEED TO STEP 18.
    
18. If the squeak is still present after performing Step 17, replace the steering gear. Refer to Workshop Manual, Section 211-00 for removal and installation procedures.

PART NUMBER PART NAME XL-3 Motorcraft Additive Friction Modifier XT-2-QDX Motorcraft MERCON® Multi-Purpose Automatic Transmission Fluid 5W4Z-3504-A Steering Gear (LS) 5W6Z-3504-A Steering Gear (Thunderbird) 5C5Z-3504-AA Steering Gear (Aviator)

Hi John there is usually a filter in the bottom of the fluid tank. In some cases it’s best to replace the tank and flush the whole system out. Hope this helps. Regards Jim...

Worn steering components which allow the steering wheels to travel too far either way,hop underneath and get a friend to move the steering while you have a look for movement between the components, or a power steering component like relief valve. Its a bit hard to know without seeing the vehicle, i suggest a steering and suspension specialist like pedders or similar.These guys can do a safety inspection only, if you want to do the work yourself. Cheers Timo.

sounds like you may have a bad front cv axle inspect it you may find that i'm right ,and no you can't disarm the all wheel drive . hope this helps you!

Make sure that the coupling shaft from the column to the rack is tight at both ends. There is a pinch bolt on the ends. If they are tight try holding the shaft while turning. You will probably feel the clunking noise. If so replace the shaft.

Get a friend to turn wheel back and forth in the garage, get on the ground and use your hands to feel where the noise is coming from. Metal gives off a significant amount of vibrations with noise. Should be easy to tell where it's coming from. Could be your rack and pinion, however I would be much more willing to consider ball joints. Hard to tell without getting "down and dirty" on the floor under the vehicle feeling for the noise.

Could be your steering gearbox, tierod end, rack and pinion piston, low power steering fluid, bad serp belt, ball joints, front struts/mounting hardware.

Also test steering with the entire vehicle on the floor and with the front end off the ground lifted by a few floor jacks lifting on the frame of the vehicle.

Ball joints especially on Ford vehicles tend to squeak after a while (mostly since they are the sealed type) even if they pass a safety inspection.