This procedure covers removal and installation of the front lower control arm on a 2021-2024 Ford F-150 with 3.5L EcoBoost V6, including ball joint separation and torquing components at ride height.

Warnings

Tools required

Parts

• Lower control arm assembly × 1 — Use OEM specification
• Ball joint castle nut × 1 — Often reusable if not damaged
• Control arm mounting bolts/nuts × 2 — Check condition, replace if corroded

Preparation

1. Park vehicle on level surface and engage parking brake
2. Loosen front wheel lug nuts while vehicle is on ground
3. Raise front of vehicle and support securely on jack stands at frame rails
4. Remove front wheel completely
5. Spray all control arm bolts, ball joint nut, and sway bar link with penetrating oil and allow to soak 10-15 minutes

Procedure

1. 1

   Disconnect sway bar link from control arm
   Locate the sway bar end link connection point on the lower control arm. Use a wrench to hold the ball stud from rotating while removing the nut with a socket. Separate the link from the control arm and move it aside.
   Torque spec

   Sway Bar Link71 Nm (52 lb-ft)
2. 2

   Remove ball joint castle nut
   Locate the lower ball joint where it connects to the steering knuckle. Remove the cotter pin if equipped. Using an 18mm socket, remove the castle nut from the ball joint stud. Do not fully remove the nut yet - leave it threaded on a few turns to protect threads during separation.
   Torque spec

   Ball Joint Nut150 Nm (111 lb-ft)
3. 3

   Separate ball joint from knuckle
   Position ball joint separator tool between the control arm and steering knuckle. Apply pressure to separate the ball joint taper from the knuckle. Once the taper breaks free, remove the castle nut completely. Support the knuckle/brake assembly to prevent it from hanging on the brake hose.
   ⚠Ball joint will release suddenly when taper breaks. Control the separation tool and support the knuckle assembly.
4. 4

   Support control arm with floor jack
   Position a floor jack under the outer end of the lower control arm near where the ball joint was connected. Raise the jack just enough to take light pressure off the control arm mounting bolts. This prevents the arm from dropping suddenly when bolts are removed.
5. 5

   Remove front control arm-to-frame bolt
   Locate the front mounting bolt that secures the control arm to the frame. This is typically the smaller of the two frame mounting points. Using a breaker bar if necessary, remove the bolt and any washers/spacers. Note the orientation and position of all components for reassembly.
   Torque spec

   Control Arm-to-Frame Bolts300 Nm (222 lb-ft)
6. 6

   Remove rear control arm-to-frame bolt
   Locate the rear mounting bolt that secures the control arm to the frame. This bolt may require accessing from multiple angles. Remove the bolt completely along with any washers or spacers. Keep all hardware organized by position.
   Torque spec

   Control Arm-to-Frame Bolts300 Nm (222 lb-ft)
7. 7

   Remove lower control arm
   With both frame bolts removed, carefully lower the floor jack and guide the control arm out of the mounting points. Maneuver the arm past the steering knuckle and any brake lines or ABS sensors. Inspect the removed arm for damage, cracks, or worn bushings.
8. 8

   Clean mounting surfaces
   Use a wire brush to clean the frame mounting points where the control arm bushings seat. Remove any rust, dirt, or debris. Clean the ball joint taper bore in the steering knuckle. Inspect frame mounting holes for damage or elongation.
9. 9

   Install new lower control arm
   Position the new or replacement control arm into the frame mounting points. Insert both front and rear mounting bolts through the frame and control arm bushings, but do NOT tighten at this time. Thread nuts on finger-tight only. Ensure any alignment tabs or indexing features are properly seated.
10. 10

    Connect ball joint to knuckle
    Raise the outer end of the control arm with the floor jack to align the ball joint stud with the steering knuckle bore. Insert the ball joint stud into the knuckle and thread on the castle nut. Tighten the nut to specification and install a new cotter pin if equipped.
    Torque spec

    Ball Joint Nut150 Nm (111 lb-ft)
11. 11

    Reconnect sway bar link
    Position the sway bar end link into the control arm mounting hole. Install the nut and tighten to specification while holding the ball stud with a wrench to prevent rotation.
    Torque spec

    Sway Bar Link71 Nm (52 lb-ft)
12. 12

    Set vehicle to ride height position
    Remove jack stands and carefully lower the vehicle until the suspension is at normal ride height with full vehicle weight on the wheels. Alternatively, use alignment support blocks under the tires to simulate ride height while keeping the vehicle elevated enough to access fasteners. The suspension must be at normal operating position before torquing control arm-to-frame bolts.
    ⚠️Control arm-to-frame bolts MUST be torqued at ride height. Torquing at full droop will twist bushings and cause premature failure.
13. 13

    Torque control arm-to-frame bolts at ride height
    With the vehicle at ride height, torque both the front and rear control arm-to-frame bolts to 300 Nm (222 lb-ft). This extremely high torque value requires a quality torque wrench and possibly a breaker bar for final tightening. Verify torque on both bolts.
    Torque spec

    Control Arm-to-Frame Bolts300 Nm (222 lb-ft)
14. 14

    Reinstall wheel and lower vehicle
    If vehicle was lowered to the ground for torquing, raise it again to install the wheel. Mount the wheel and hand-tighten all lug nuts in a star pattern. Lower the vehicle completely to the ground and torque lug nuts to specification in a star pattern.
    Torque spec

    Wheel Lug Nuts156 Nm (115 lb-ft)

Reassembly

1. Verify all fasteners are torqued to specification, particularly the control arm-to-frame bolts at ride height
2. Confirm ball joint castle nut has cotter pin installed if equipped
3. Check for any interference between control arm and brake lines, ABS sensors, or CV axles during suspension travel

Verification

• Test drive vehicle at low speed in a safe area and verify no unusual noises from front suspension
• Check for any clunking or looseness over bumps
• Schedule four-wheel alignment immediately - control arm replacement will significantly affect toe, camber, and caster settings
• After 50-100 miles, re-verify torque on all control arm mounting bolts
• Inspect ball joint boot for proper seating and no damage

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