This procedure covers the removal and replacement of the lower ball joint on a 2011-2014 Ford F-150 3.5L EcoBoost 4WD, requiring separation of the ball joint from the steering knuckle.

Warnings

Tools required

Parts

• Lower ball joint × 1 — Use OEM specification or Motorcraft equivalent
• Cotter pin × 1 — Use OEM specification
• Pinch bolt × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Chock rear wheels securely
3. Loosen front wheel lug nuts while vehicle is still on ground
4. Raise front of vehicle and support on jack stands at frame rails
5. Remove front wheel on side being serviced
6. Spray penetrating oil on ball joint nut, pinch bolt, and control arm bolts if corrosion is present

Procedure

1. 1

   Remove cotter pin and ball joint nut
   Straighten and remove the cotter pin from the ball joint castle nut using pliers or drill out if corroded. Remove the ball joint castle nut using a 21mm socket. Keep nut accessible as you may need to thread it back on partially during separation.
2. 2

   Separate ball joint from steering knuckle
   Use a ball joint separator tool or pickle fork to separate the ball joint stud from the steering knuckle. Position the tool between the control arm and knuckle. Strike the tool with a hammer or use a threaded separator to apply pressure. Support the lower control arm with a floor jack to control movement as the joint separates. The knuckle will drop when separated.
   ⚠️Place floor jack under lower control arm before separating ball joint. The arm will drop suddenly under spring tension.
3. 3

   Remove pinch bolt if equipped
   If your F-150 has a pinch bolt securing the ball joint to the knuckle, remove it completely using the appropriate socket. Discard the old pinch bolt as a new one must be installed. Note that some configurations use only the castle nut.
4. 4

   Disconnect sway bar link if necessary
   If access to the control arm bolts is restricted, disconnect the sway bar link from the lower control arm. Hold the shaft with an Allen key while removing the nut with a wrench to prevent spinning.
   Torque spec

   Sway Bar Link Nuts55 Nm (41 lb-ft)
5. 5

   Mark and remove control arm bolts
   Support the lower control arm with a floor jack. Mark the position of the control arm relative to the frame for alignment reference. Remove both front and rear control arm mounting bolts using an 18mm socket and breaker bar. Lower the jack slowly to allow the control arm to drop clear of the frame mounts.
   ⚠Control arm is heavy. Ensure floor jack is positioned to safely lower the arm.
6. 6

   Remove old ball joint from control arm
   Place the control arm in a ball joint press or hydraulic press. Position the receiving cup under the control arm and the pressing adapter on top of the ball joint. Apply steady pressure to press the old ball joint out of the control arm. The joint will require significant force to remove. Clean the ball joint bore in the control arm with a wire brush.
   ⚠Ensure press tools are properly aligned to avoid damaging the control arm bore.
7. 7

   Install new ball joint
   Position the new ball joint in the control arm bore with the stud facing down. Verify the ball joint is fully seated in the correct orientation. Use the ball joint press with appropriate adapters to press the new joint into the control arm. Press until the ball joint is fully seated and flush with the control arm surface. The joint should be firmly seated with no gaps visible.
8. 8

   Reinstall control arm
   Raise the control arm into position using the floor jack, aligning it with the marks made during removal. Insert both control arm bolts and thread them hand-tight. Do NOT torque these bolts yet - they must be torqued with vehicle weight on the wheels.
9. 9

   Connect ball joint to steering knuckle
   Raise the lower control arm with the floor jack to align the ball joint stud with the hole in the steering knuckle. Insert the ball joint stud into the knuckle. Thread the castle nut onto the ball joint stud and tighten to the specified torque.
   Torque spec

   Ball Joint Nut117 Nm (86 lb-ft)
10. 10

    Install cotter pin and pinch bolt
    Install a new cotter pin through the castle nut and ball joint stud. The slots in the castle nut must align with the hole in the stud. If necessary, tighten the nut slightly (not exceeding 117 Nm / 86 lb-ft) to achieve alignment - never loosen to align. Bend the cotter pin ends to secure. If equipped with a pinch bolt, install the new pinch bolt and torque to specification.
    Torque spec

    Pinch Bolt70 Nm (52 lb-ft)
11. 11

    Reconnect sway bar link
    If the sway bar link was disconnected, reconnect it to the lower control arm. Hold the shaft with an Allen key and torque the nut to specification.
    Torque spec

    Sway Bar Link Nuts55 Nm (41 lb-ft)
12. 12

    Reinstall wheel and lower vehicle
    Install the wheel and thread lug nuts hand-tight. Lower the vehicle until the tire just contacts the ground but the suspension is not fully loaded. Torque the lug nuts to specification in a star pattern. Fully lower the vehicle so the suspension is at normal ride height with full vehicle weight on the wheels.
    Torque spec

    Wheel Lug Nuts156 Nm (115 lb-ft)
13. 13

    Final torque control arm bolts
    With the vehicle at normal ride height and full weight on the wheels, torque both control arm bolts to specification. This is critical - torquing with the suspension unloaded will cause premature bushing failure. Bounce the suspension several times and re-verify torque.
    ⚠Control arm bolts MUST be torqued with vehicle weight on wheels. Do not torque while suspended.
    Torque spec

    Control Arm Bolts165 Nm (122 lb-ft)

Reassembly

1. Reassembly is covered in the procedure steps above
2. Ensure all torque specifications are met, especially control arm bolts with vehicle at ride height
3. Verify cotter pin is properly installed and secured

Verification

• Perform a visual inspection of the ball joint installation to ensure it is fully seated in the control arm
• Verify the cotter pin is properly installed and bent to prevent loosening
• Check that all fasteners are torqued to specification
• Test drive the vehicle at low speed and verify no clunking noises from the suspension
• Schedule a professional alignment as suspension geometry has been disturbed

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