🔧 F-150 - Front Control Arm Replacement

This repair replaces the front suspension control arms on your F-150. Control arms hold the wheel assembly in position and allow the suspension to move up and down; worn bushings or ball joints can cause clunks, wandering steering, uneven tire wear, or poor alignment.

Difficulty Level: Advanced | Estimated Time: 3-5 hours

Assumption: This guide covers the front upper and lower control arms on your 4WD F-150; replace arms in pairs when possible.

---

⚠️ Safety & Precautions

• ⚠️ The front coilover strut is under spring pressure. Do not remove the center strut shaft nut.
• ⚠️ Always support your F-150 with jack stands. Never work under a truck held only by a jack.
• ⚠️ A ball joint separator is a tool that safely separates the ball joint stud from the steering knuckle without hammering directly on the stud.
• ⚠️ Control arm bolts must be final-tightened at normal ride height. Tightening them while the suspension hangs can damage the new bushings.
• ⚠️ A wheel alignment is required after this repair.
• ⚠️ Battery disconnect is not required for this mechanical repair.

---

🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Safety glasses
• Mechanic gloves
• 1/2-inch drive breaker bar
• 1/2-inch drive torque wrench
• 3/8-inch drive ratchet
• 21mm socket
• 18mm socket
• 15mm socket
• 10mm socket
• 21mm wrench
• 18mm wrench
• 15mm wrench
• Ball joint separator (specialty)
• Pry bar
• Dead blow hammer
• Needle-nose pliers
• Paint marker
• Penetrating oil
• Wire brush

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front upper control arms - Left and Right - Qty: 2
• Front lower control arms - Left and Right - Qty: 2
• Upper control arm nuts and bolts - Qty: 1 kit
• Lower control arm nuts and bolts - Qty: 1 kit
• Ball joint nuts - Qty: 4
• Cotter pins - Qty: 4
• Front sway bar link nuts - Qty: 2

Note: Replace control arms in pairs left-to-right to keep suspension feel and ride height even.

---

📋 Before You Begin

• 🅿️ Park your F-150 on level ground and set the parking brake.
• 🧱 Place wheel chocks behind the rear wheels.
• 🔩 Use a paint marker to mark the position of the lower control arm cam bolts before loosening them. Cam bolts are eccentric alignment bolts used to adjust wheel alignment.
• 🛞 Loosen the front lug nuts slightly before lifting the truck.
• 🧰 Spray penetrating oil on the control arm bolts, ball joint nuts, and sway bar link nuts.
• 📐 Schedule a professional wheel alignment before driving long distances.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and Support the Front End

• Use the 21mm socket and breaker bar to loosen the front wheel lug nuts 1/2 turn.
• Use the floor jack under the front crossmember to raise your F-150.
• Place jack stands under the frame rails.
• Lower the truck gently onto the stands.
• Use the 21mm socket to remove the front wheels.
• Shake truck gently to confirm stability.

Step 2: Remove Brake Hose and ABS Wire Brackets

• Use the 10mm socket to remove the brake hose bracket from the upper control arm area if attached.
• Use the 10mm socket to remove the ABS wheel speed sensor wire bracket from the control arm or knuckle area.
• Move the hose and wire aside carefully. Do not stretch or kink them.

Step 3: Disconnect the Front Sway Bar Link

• Use the 18mm socket and 18mm wrench to remove the sway bar link nut from the lower control arm.
• Push the sway bar link out of the lower control arm.
• If the stud spins, hold it with the correct wrench while removing the nut with the 18mm socket.

Step 4: Separate the Upper Ball Joint

• Use needle-nose pliers to remove the cotter pin from the upper ball joint nut.
• Use the 18mm socket or 18mm wrench to loosen and remove the upper ball joint nut.
• Use the ball joint separator to separate the upper ball joint from the steering knuckle.
• Support the steering knuckle by hand so it does not pull on the brake hose.
• Do not hammer the threaded stud.

Step 5: Remove the Upper Control Arm

• Use the 21mm socket and 21mm wrench to remove the two upper control arm mounting bolts and nuts.
• Slide the upper control arm out from the frame brackets.
• Compare the new upper control arm with the old one before installing it.

Step 6: Install the New Upper Control Arm

• Place the new upper control arm into the frame brackets.
• Use the 21mm socket and 21mm wrench to install the mounting bolts and nuts loosely.
• Do not fully tighten the bushing bolts yet.
• Insert the upper ball joint stud into the steering knuckle.
• Use the 18mm socket to install the new ball joint nut.
• Torque upper ball joint nut to 85 Nm (63 ft-lbs), then tighten further only as needed to install the cotter pin.
• Use needle-nose pliers to install the new cotter pin.

Step 7: Mark the Lower Control Arm Cam Bolts

• Use the paint marker to mark the position of each lower control arm cam washer against the frame.
• This helps keep the alignment close enough to drive to the alignment shop.
• Marks are not a substitute for alignment.

Step 8: Support the Lower Control Arm

• Place the floor jack under the lower control arm near the ball joint.
• Raise the jack just enough to support the arm.
• Do not lift the truck off the jack stands.

Step 9: Separate the Lower Ball Joint

• Use needle-nose pliers to remove the cotter pin from the lower ball joint nut.
• Use the 21mm socket or 21mm wrench to loosen and remove the lower ball joint nut.
• Use the ball joint separator to separate the lower ball joint from the steering knuckle.
• Carefully support the steering knuckle so it does not pull on the brake hose or ABS wire.

Step 10: Remove the Lower Control Arm

• Use the 21mm socket and 21mm wrench to remove the lower control arm cam bolt nuts.
• Slide the cam bolts out while noting their original direction.
• Lower the floor jack slowly and remove the lower control arm.
• If the arm sticks in the bracket, use the pry bar and dead blow hammer to work it loose.

Step 11: Install the New Lower Control Arm

• Position the new lower control arm in the frame brackets.
• Use the floor jack to raise the arm into place.
• Install the cam bolts in the same direction they were removed.
• Align the cam washers with your paint marks.
• Use the 21mm socket and 21mm wrench to install the nuts loosely.
• Do not fully tighten the bushing bolts yet.

Step 12: Connect the Lower Ball Joint

• Guide the lower ball joint stud into the steering knuckle.
• Use the 21mm socket to install the new lower ball joint nut.
• Torque lower ball joint nut to 150 Nm (111 ft-lbs), then tighten further only as needed to install the cotter pin.
• Use needle-nose pliers to install the new cotter pin.

Step 13: Reconnect the Sway Bar Link

• Insert the sway bar link into the lower control arm.
• Use the 18mm socket and 18mm wrench to install the nut.
• Torque sway bar link nut to 75 Nm (55 ft-lbs).

Step 14: Reinstall Brake Hose and ABS Wire Brackets

• Use the 10mm socket to reinstall the brake hose bracket.
• Use the 10mm socket to reinstall the ABS wire bracket.
• Make sure the wire and hose do not rub the tire, spring, or control arm.

Step 15: Final-Tighten Control Arm Bolts at Ride Height

• Use the floor jack under the lower control arm to raise the suspension until the truck’s weight is close to normal ride height.
• Use the 21mm socket, 21mm wrench, and torque wrench to tighten the upper control arm mounting bolts.
• Torque upper control arm mounting bolts to 129 Nm (95 ft-lbs).
• Use the 21mm socket, 21mm wrench, and torque wrench to tighten the lower control arm cam bolt nuts.
• Torque lower control arm cam bolt nuts to 350 Nm (258 ft-lbs).
• Ride-height tightening protects new bushings.

Step 16: Reinstall the Wheels

• Use the 21mm socket to reinstall the front wheels and snug the lug nuts.
• Use the floor jack to raise your F-150 slightly and remove the jack stands.
• Lower the truck to the ground.
• Use the 21mm socket and torque wrench to tighten the lug nuts in a star pattern.
• Torque wheel lug nuts to 204 Nm (150 ft-lbs).

---

✅ After Repair

• ✅ Bounce the front of your F-150 a few times and listen for clunks.
• ✅ Turn the steering wheel lock-to-lock and check that hoses and wires do not stretch or rub.
• ✅ Test drive slowly first. Listen for knocking, popping, or steering pull.
• ✅ Get a professional 4-wheel alignment as soon as possible.
• ✅ Recheck all visible fasteners after the first short drive.
• ✅ Recheck wheel lug nut torque after 50-100 miles.

---

💰 DIY vs Shop Cost

Shop Cost: $1,200-$2,200 (parts + labor)

DIY Cost: $450-$1,000 (parts only)

You Save: $750-$1,200 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 4-7 hours including alignment-related setup.

---

🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.