Control Arm Bushing - Front Lower

Remove and replace the front lower control arm bushings on a 1972 Ford F-100 with 302ci V8, restoring proper suspension geometry and handling.

Warnings

Tools required

Parts

• Front lower control arm bushing kit (2 bushings per side) × 2 — Use OEM specification or Moog K7057
• Lower ball joint castle nut (if damaged) × 2 — Use OEM specification
• Cotter pins (3/32 inch) × 2 — Use OEM specification

Preparation

1. Park vehicle on level, solid ground and set parking brake firmly
2. Place wheel chocks behind rear wheels
3. Loosen front wheel lug nuts while vehicle is on ground
4. Raise front of vehicle with floor jack at factory jacking points on frame
5. Support vehicle on jack stands placed under frame rails behind crossmember
6. Remove front wheels completely
7. Spray all suspension fasteners with penetrating oil and allow to soak for 15 minutes minimum

Procedure

1. 1

   Support lower control arm
   Position floor jack under the Twin I-Beam axle near the coil spring seat to support the axle weight and maintain spring tension. Raise jack until it just contacts the beam but does not lift the vehicle. This keeps the coil spring compressed and prevents sudden movement.
2. 2

   Remove lower ball joint cotter pin and castle nut
   Locate the lower ball joint where it connects to the steering knuckle. Remove the cotter pin by straightening the legs and pulling it out with pliers. Using the appropriate SAE socket, remove the castle nut from the ball joint stud. Do not fully drop the control arm yet.
3. 3

   Separate ball joint from steering knuckle
   Using a ball joint separator (pickle fork or puller-style), break the taper between the ball joint stud and steering knuckle. Position the separator tool between the control arm and knuckle, then strike with a hammer or tighten the puller until the joint separates. Carefully lower the jack to relieve spring tension and lower the control arm away from the knuckle.
   ⚠The control arm will drop when the ball joint separates. Control the descent with the floor jack.
4. 4

   Remove front control arm pivot bolt
   Locate the radius (strut) arm-to-frame bracket nut and the I-beam pivot bolt. Using the appropriate SAE socket and breaker bar, remove the fasteners and note the orientation of all washers and bushing spacers for reinstallation. These fasteners may require significant force to break free.
5. 5

   Remove rear control arm pivot bolt
   Locate the I-beam pivot bolt at the frame crossmember and the radius arm bushing hardware. Using the appropriate SAE socket and breaker bar, remove the fasteners and any washers. With the pivot and radius arm fasteners removed, the I-beam/radius arm can be lowered and maneuvered for bushing service.
6. 6

   Inspect control arm and prepare for bushing removal
   Place the control arm on a sturdy workbench. Inspect the control arm for cracks, severe rust, or deformation. Clean the bushing mounting areas with a wire brush. Measure the inner sleeve diameter and outer bushing housing to ensure proper press fit dimensions for new bushings.
7. 7

   Press out old bushings
   Using a control arm bushing press kit or heavy-duty C-clamp with appropriately sized receiving cups, press the old bushings out of the control arm. Position the receiving cup on one side to catch the bushing, and use a driver on the opposite side to push the bushing through. The front bushing and rear bushing both press out in the same manner. Apply steady, even pressure to avoid damaging the control arm housing.
8. 8

   Clean bushing bores
   After removing old bushings, thoroughly clean the bushing bores in the control arm with a wire brush and solvent. Remove all rust, rubber residue, and debris. Inspect the bores for damage or out-of-round condition. The bores should be smooth and uniform for proper new bushing installation.
9. 9

   Press in new front bushing
   Position the new front bushing at the front control arm bore. Ensure the bushing is square to the bore opening. Using the bushing press kit or C-clamp with proper sized driver, press the bushing into the control arm until it is fully seated and flush with both sides of the control arm. The inner metal sleeve should be centered in the bushing. Do not lubricate the outer bushing housing as this can cause slippage.
10. 10

    Press in new rear bushing
    Position the new rear bushing at the rear control arm bore. Ensure the bushing is square to the bore opening. Using the bushing press kit or C-clamp with proper sized driver, press the bushing into the control arm until it is fully seated and flush with both sides of the control arm. Verify both bushings are fully seated and aligned properly before reinstallation.
11. 11

    Reinstall control arm to frame
    Maneuver the control arm back into position under the vehicle. Align the front bushing with the front frame bracket and insert the front pivot bolt with washers in their original orientation. Do not fully tighten yet. Align the rear bushing with the rear frame bracket and insert the rear pivot bolt with washers. Thread both nuts on by hand but leave loose to allow control arm movement.
12. 12

    Raise control arm and connect ball joint
    Position the floor jack under the lower control arm near the ball joint. Raise the jack to lift the control arm and align the ball joint stud with the hole in the steering knuckle. Continue raising until the ball joint stud protrudes through the knuckle. Install the castle nut and tighten by hand, then torque to specification and align the next castle slot with the cotter pin hole. Install a new cotter pin and bend the legs to secure.
    ℹ️The ball joint castle nut must be tightened to proper specification and aligned with the cotter pin hole. Never loosen the nut to align the hole.
13. 13

    Torque control arm pivot bolts at ride height
    With the floor jack still supporting the control arm, adjust jack height until the control arm is at normal ride height position (simulating the vehicle weight on the suspension). The control arm should be roughly parallel to the ground. With the suspension at this position, torque the I-beam pivot bolt and the radius (strut) arm-to-frame nut to factory specification. This prevents binding and premature bushing wear.
    ℹ️Control arm pivot bolts must be torqued with suspension at ride height to prevent bushing wind-up and premature failure.

Reassembly

1. Reinstall wheel and thread lug nuts by hand to avoid cross-threading
2. Lower vehicle until tire just contacts ground but vehicle weight is still on jack stands
3. Torque wheel lug nuts in star pattern to 85-95 ft-lbs
4. Remove jack stands and lower vehicle completely to ground
5. Repeat entire procedure for opposite side
6. Bounce front end several times to settle suspension
7. Recheck all fastener torques after settling suspension

Verification

• Start engine and turn steering wheel lock-to-lock while stationary to verify no binding or interference
• Test drive vehicle at low speed and verify steering returns to center properly
• Listen for clunks, squeaks, or unusual noises from front suspension during test drive
• Inspect all fasteners after 50-100 miles of driving and re-torque if necessary
• Schedule front-end alignment within 100 miles as bushing replacement affects camber and caster settings

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