How to Diagnose and Fix Clunking Noises in Your Expedition's Front End

How to Fix Control Arm Issue

For 2020 Ford Expedition owners, addressing front-end noises like clanking or clicking often points to the suspension, specifically the control arms and their associated ball joints. While the term "control arm issue" is a common catch-all for these symptoms, the root cause can vary. The key is a methodical diagnosis to pinpoint the exact failing component before replacing parts. As one owner on the Expedition Forum advised regarding suspension diagnosis, "You will see play and hear knocking from the lower ball joints long before you ever see it in the upper. If you lift it that much make sure to get the alignment checked afterwards."

Symptoms

The most common symptom reported by owners is audible noise from the front end, particularly during driving maneuvers that load the suspension. You may hear a distinct clanking or knocking sound when going over bumps, potholes, or uneven pavement. This noise occurs because a worn joint in the suspension system has developed excess play, allowing metal components to move and impact each other.

Another frequent symptom is a clicking sound, which can sometimes be more noticeable during turning or when applying torque. This is often a telltale sign of a failing ball joint, which is a pivotal component housed within the control arm assembly. A creaking noise, especially at low speeds or when the suspension articulates, can also indicate dry or worn bushings within the control arms.

It’s crucial to pay attention to when and how these noises occur. Is it only on one side? Does it happen when braking or accelerating? Answering these questions helps narrow down the diagnosis. Ignoring these sounds can lead to further wear, poor handling, and in severe cases, a catastrophic failure where a ball joint separates, causing a loss of wheel control.

Most Likely Cause

Based on analysis of owner reports and discussions, the most likely cause of clanking and knocking noises attributed to a "control arm issue" is worn ball joints. The ball joint is the spherical bearing that connects the control arm to the steering knuckle, allowing for pivoting movement. Over time and miles, the protective boot can tear, allowing contaminants like dirt and moisture to enter. This leads to accelerated wear of the joint itself, creating the play that results in audible knocking.

As highlighted in owner discussions, the lower ball joints are typically the first to show wear and cause noticeable symptoms. "You will see play and hear knocking from the lower ball joints long before you ever see it in the uppers," confirmed an experienced forum member. While control arm bushings can also fail and cause creaking, the pronounced clanking or knocking is a hallmark of ball joint failure. It’s a critical safety item that requires prompt attention.

How to Diagnose

A proper diagnosis requires safely lifting the front of the truck to relieve the suspension's load. You will need a sturdy floor jack, jack stands rated for the vehicle's weight, a pry bar (like a large screwdriver or a dedicated tool), and a helper.

First, safely lift the vehicle and support it securely on jack stands under the frame, leaving the front wheels hanging freely. With the wheel off the ground, grip the tire at the top and bottom. Try to rock the wheel in a "push-pull" motion (like trying to turn the top of the tire toward you while pulling the bottom away). Any significant in-and-out play at the top or bottom of the tire can indicate wheel bearing or ball joint wear.

Next, for a more precise check on the ball joint, place a pry bar or a long piece of wood under the tire. Gently lift up on the tire. As you do this, have your helper look at where the ball joint connects to the knuckle. Any visible upward movement or gap at that connection point while the control arm itself remains stationary is a definitive sign of a worn ball joint. You can also try to move the control arm itself with the pry bar to check for bushing play. Listen for any clunks that match the sound you hear while driving.

Step-by-Step Fix

Replacing a ball joint or a complete control arm assembly is a significant DIY job that requires mechanical skill, proper tools, and attention to safety. The following steps outline the general process for replacing a lower control arm/ball joint assembly, which is often the recommended approach as it includes new bushings.

1. Safety First: Park on a level surface, engage the parking brake, and chock the rear wheels. Loosen the lug nuts on the affected wheel slightly before lifting.

2. Lift and Support: Use a floor jack to lift the front of the truck from the designated frame point. Place jack stands securely under the frame and lower the jack onto the stands. Remove the lug nuts and the wheel.

3. Disconnect Components: Remove the cotter pin and castle nut from the tie rod end connected to the steering knuckle. Use a tie rod separator or pickle fork to disconnect it. Next, disconnect the stabilizer bar link from the lower control arm. Then, remove the brake caliper (hang it securely with wire—do not let it hang by the hose) and the rotor for better access.

4. Separate the Ball Joint: This is the critical step. Remove the cotter pin and the large castle nut securing the ball joint stud to the steering knuckle. You will need a heavy hammer or a specialized ball joint separator tool to break the stud free from the knuckle. Strike the side of the knuckle where the stud passes through sharply; the shock often pops it loose. Avoid striking the stud itself.

5. Remove the Control Arm: The lower control arm is typically held by two large bolts that go through the frame brackets. Support the control arm with a jack, then remove these bolts. The arm, with the old ball joint, can now be removed from the vehicle.

6. Install the New Assembly: If you purchased a complete control arm with a pre-installed ball joint and bushings, installation is the reverse. Position the new arm, install the frame bolts hand-tight, connect the ball joint stud to the knuckle, and torque the castle nut to specification. Install a new cotter pin. As one owner learned during a different repair, always double-check connections: "But am wondering if I didn't waste my time and $65 on the new clock spring as I still have no cruise." This underscores the importance of verifying every step.

7. Reassemble and Align: Reconnect the tie rod end, stabilizer link, brake rotor, and caliper. Install the wheel and lower the vehicle. A professional alignment is absolutely mandatory after this repair. As the forum advice stated, any suspension lift or component replacement requires an alignment check.

Parts and Tools Needed

• Parts: Lower Control Arm Assembly (includes ball joint and bushings). It is highly recommended to buy a complete, quality assembly (e.g., from Motorcraft, Moog, or Mevotech). Part numbers vary by trim and drivetrain (4x2 vs 4x4). Always verify fitment for your specific 2020 Expedition.
• Tools: Floor jack, (2) Jack stands, Lug wrench, Torque wrench, Socket set (metric, including large sizes for ball joint and control arm bolts), Tie rod end separator/pickle fork, Hammer, Pry bar, Wire or cord to hang caliper, Safety glasses, Gloves.

Real Owner Costs

Repair costs can vary widely based on whether you perform the work yourself and what parts you use. The quotes from owners on related repairs provide a good benchmark for labor rates.

• DIY Cost: A quality aftermarket lower control arm assembly can range from $150 to $300 per side. Adding in miscellaneous supplies (penetrating oil, cotter pins), a DIY repair for one side typically costs $200 - $350 in parts. This reflects the significant savings, as noted by an owner considering a tow package install: "The 'super engine cooling' radiator was $299 at fordparts.com (could do that myself)."

• Professional Shop Cost: At a repair shop, you are paying for parts markup and labor. Labor for one side can range from 2.5 to 4 hours. At an average rate of $125-$150/hour, labor alone could be $300-$600. With parts markup, total repair costs at an independent shop often fall between $600 and $1,000 per side. A dealership will be higher. For comparison, an owner was quoted "$358 just to install the factory electronic brake controller," illustrating typical dealership labor charges for a multi-hour job.

Prevention

Preventing premature ball joint and control arm bushing failure revolves around awareness and maintenance. Regularly listen for new noises from the suspension, especially after hitting a severe pothole or curb. During routine oil changes, ask the technician to check the condition of the ball joint boots for tears and to look for signs of leaking grease.

There are no serviceable grease fittings on most OEM Ford ball joints, so you cannot lubricate them. The best prevention is to avoid harsh impacts, drive on rough roads with care, and address any minor symptoms immediately before they lead to a more dangerous and expensive failure. Keeping the vehicle within its designed weight limits also helps, as overloading stresses all suspension components.

What Owners Say

Real experiences from FORD owners:

Success Stories

"Or maybe it's not a Sync issue; from another Apple forum: "I've had this same problem ever since I upgraded my Ford truck to Sync 3 version 2.2. It worked fine until the Ford Sync update and nothing else changed on my iPhone 7+." — aggiegrad05 (source)

"It worked fine until the Ford Sync update and nothing else changed on my iPhone 7+. Every time I get in the truck and Bluetooth connects, it raises my ring volume to max." — aggiegrad05 (source)

"AC still worked perfect...well, what I consider perfect. Anyway, I took my brother and his family to that airport and on the way home it was lit like it should be." — swagfu (source)

Owner Experiences

"Found the problem, with the Dorman intake manifold my exhaust pressure never reached over 4psi and would fall as I held the engine at a higher rpm. The knock/tick I previously tried to explain and never gave a definite answer to what or where it was coming from." — cmlangley (source)

"The knock/tick I previously tried to explain and never gave a definite answer to what or where it was coming from. It was coming directly from the center of the intake manifold, yes I know there is nothing mechanical there other than the idle air control motor and it certainly wasn't that." — cmlangley (source)

"Changing out both lower control arm Drivers ball joint move freely. Both Stabilizer links one the boots shot a nut let go at one point. the other moves freely." — juan214 (source)

Lessons Learned

⚠️ "But am wondering if I didn't waste my time and $65 on the new clock spring as I still have no cruise. BTW, the horn was constantly "on" with the new clock spring just like with the old clock spring." — 71Rcode (source)

⚠️ "The flasher is built into the body control module on the later Expy's. To eliminate the fast flash bulb out warning you get with led's you have to go to the dealer and have them turn it off with their scanner.No big deal,fleets do it all the time but it will probably cost you $50 or so." — cheapjeep (source)

⚠️ "To eliminate the fast flash bulb out warning you get with led's you have to go to the dealer and have them turn it off with their scanner.No big deal,fleets do it all the time but it will probably cost you $50 or so." — cheapjeep (source)

Pro Tips from Owners

💡 "Ultimately it will go by your GVWR at that point when you tow. If you do the upgrades pay attention to your payload and gross vehicle weight ratings to fly legal and you should be OK." — JExpedition07 (source)

💡 "You will see play and hear knocking from the lower ball joints long before you ever see it in the uppers. If you lift it that much make sure to get the alignment checked afterwards. -Mike" — Hamfisted (source)

💡 "If you do the upgrades pay attention to your payload and gross vehicle weight ratings to fly legal and you should be OK. It’s a lot more work than meets the eye." — JExpedition07 (source)

Real Repair Costs

"They quoted me $358 just to intall the factory electronic brake controller. The 'super engine cooling' radiator was $299 at fordparts.com (could do that myself) and the aux tranny cooler was $53 something (not including all the tubing, brackets, etc." — jmden (DIY) (source)

"Will go check their numbers tomorrow, but what are they doing...installing a whole new wiring harness? They quoted me $358 just to intall the factory electronic brake controller." — jmden (source)

FAQ

Q: How long does it take to fix a control arm or ball joint? A: For an experienced DIYer with the right tools, replacing one lower control arm assembly can take 3 to 5 hours. For a first-timer, allot a full day. A professional mechanic can typically complete the job in 2 to 3 hours of billed labor.

Q: Can I drive with a knocking ball joint? A: It is strongly discouraged. A worn ball joint is a critical safety failure point. If it separates completely while driving, you will lose control of that wheel, which can lead to a serious accident. Have it diagnosed and repaired as soon as possible.

Q: Is this a common issue on the Expedition? A: While not a universal epidemic, front suspension wear is a common issue on any full-size SUV as mileage accumulates. The 2020 Expedition is a heavy vehicle, and its ball joints and bushings are under constant stress. Forum discussions frequently cover diagnosis and repair of front-end clunks, confirming it's a known wear item.

Q: DIY vs mechanic - what's recommended? A: This is an intermediate to advanced DIY job. It requires forceful techniques (separating tapered joints), proper torquing of critical suspension bolts, and a mandatory alignment afterward. If you are comfortable with brake jobs and have a good tool set, it's achievable. If you are unsure, the safety-critical nature of the repair makes hiring a professional a wise choice. Consider the cost comparison: a $350 DIY fix versus an $800 shop bill.

Q: Should I replace just the ball joint or the whole control arm? A: Most mechanics and experienced DIYers recommend replacing the entire control arm assembly. This gives you a new ball joint and new control arm bushings in one unit. It simplifies installation (no need to press in a new ball joint) and addresses all wear points in that component. The marginal extra cost is worth the assurance and saved labor.

Q: Do I need an alignment after replacement? A: Yes, absolutely. Replacing a control arm will change the suspension geometry. Driving without a proper alignment will cause rapid, uneven tire wear and may affect handling. Budget for this essential follow-up service, which typically costs between $100 and $150.