Replace worn subframe bushings on the front suspension to restore handling, reduce noise, and eliminate vibration caused by deteriorated rubber mounts.

Warnings

Tools required

Parts

• Front subframe bushings (set of 4) × 1 — Use OEM specification
• Ball joint nut (if damaged) × 2 — Use OEM specification
• Subframe mounting bolts (if corroded) × 4 — Use OEM specification

Fluids

• Motorcraft MERCON LV — 0.5 qt

Preparation

1. Park vehicle on level, solid surface and engage parking brake
2. Place wheel chocks behind rear wheels
3. Raise front of vehicle and support on jack stands at frame rails behind front subframe
4. Remove both front wheels
5. Spray all subframe mounting bolts, control arm bolts, and ball joint nuts with penetrating oil and allow to soak 15-30 minutes
6. Mark steering wheel center position and ensure front wheels are pointed straight ahead
7. Disconnect negative battery terminal to prevent airbag deployment if equipped with steering position sensor

Procedure

1. 1

   Disconnect steering and stabilizer components
   Disconnect the sway bar end links from both lower control arms by holding the shaft with an Allen key and removing the nuts. Mark or photograph steering shaft-to-rack connection for alignment reference. Remove steering shaft coupler bolt and separate shaft from steering rack pinion. Support shaft to prevent damage to column.
   Torque spec

   Sway Bar Link Nuts55 Nm (41 lb-ft)
2. 2

   Separate ball joints from knuckles
   Remove the ball joint castle nuts from both lower control arms. Use a ball joint separator or pickle fork to separate the ball joints from the steering knuckles. Do not damage the ball joint boots. Allow the knuckle assembly to pivot upward and secure with wire or bungee cord to the frame to prevent strain on brake hoses and CV axles.
   ⚠Do not allow knuckle assembly to hang by brake hose or CV axle. Support weight to prevent damage.
   Torque spec

   Ball Joint Nut110 Nm (81 lb-ft)
3. 3

   Disconnect power steering lines
   Place drain pan under power steering rack. Disconnect power steering pressure and return lines from the steering rack. Cap or plug lines and rack ports immediately to prevent contamination and excessive fluid loss. Use appropriate flare nut wrenches to prevent line damage.
   ⚠Power steering fluid will drain from lines and rack. Ensure adequate catch pan capacity and wear protective gloves.
4. 4

   Support subframe with transmission jack
   Position a transmission jack or dedicated subframe support jack under the center of the front subframe. Raise jack until it just contacts the subframe with light pressure. Ensure jack is centered and stable. The subframe must remain level during lowering process to prevent binding.
   ⚠️Subframe weighs approximately 150-200 lbs with attached components. Ensure jack has adequate capacity and is positioned securely.
5. 5

   Remove subframe mounting bolts
   Locate all four subframe-to-frame mounting bolts (two front, two rear). Using a breaker bar and socket, loosen all four bolts but do not remove completely. Once all bolts are loose, remove them in a cross pattern (front left, rear right, front right, rear left) while supporting subframe weight with the jack. Keep bolts organized by position.
   ⚠️Ensure subframe jack is securely supporting full weight before removing final bolts. Subframe may shift suddenly when bolts are removed.
   Torque spec

   Mounting Bolts34 Nm (25 lb-ft)
6. 6

   Lower subframe
   Slowly and evenly lower the subframe using the jack. Lower approximately 4-6 inches or until bushings are accessible for removal. Monitor all attached components (brake lines, wiring harnesses, CV axles) to ensure nothing is being stretched or damaged. Stop lowering when bushings can be accessed. Complete removal of subframe is not necessary for bushing replacement.
   ⚠Lower subframe slowly and check clearance of all components. If resistance is felt, stop and identify the obstruction.
7. 7

   Remove old subframe bushings
   With subframe lowered, access the four bushing locations (one at each corner of subframe). Note bushing orientation and any alignment marks. Use a bushing press tool, hydraulic press, or appropriate driver to press out the old bushings from the subframe mounting points. Clean all bushing bores thoroughly with wire brush, removing rust, debris, and old rubber. Inspect bores for cracks or damage.
   ℹ️Original bushings may be severely deteriorated. Mark orientation before removal as new bushings must be installed in same direction.
8. 8

   Install new subframe bushings
   Apply light coating of soapy water or bushing installation lubricant to new bushing outer surfaces (do not use petroleum-based lubricants). Align new bushings with correct orientation matching original installation. Using bushing press tool or hydraulic press, press new bushings into subframe mounting points until fully seated and flush. Ensure bushings are not cocked or misaligned during installation. Verify all four bushings are properly seated.
   ⚠Bushings must be pressed in straight to avoid tearing or misalignment. Use proper size driver that contacts outer bushing shell only.
9. 9

   Raise and align subframe
   Using the subframe jack, carefully raise the subframe back into position. Align subframe mounting holes with frame rail holes. Use a pry bar or long punch to assist alignment if necessary. Ensure steering rack is properly positioned and all components clear their mounting points. New bushings may require slight manipulation to align bolt holes.
   ⚠Do not force subframe into position. New bushings are stiffer than worn originals and may require patient alignment.
10. 10

    Install subframe mounting bolts
    Insert all four subframe mounting bolts through frame rails into subframe. Start all bolts by hand to ensure proper thread engagement. Once all bolts are started, tighten in a cross pattern to specification. If original bolts show thread damage or excessive corrosion, replace with new bolts. Apply thread-locking compound to bolt threads if specified by manufacturer.
    Torque spec

    Mounting Bolts34 Nm (25 lb-ft)
11. 11

    Reconnect power steering lines
    Remove caps from power steering lines and rack ports. Reconnect pressure and return lines to steering rack using appropriate torque on fittings (typically hand-tight plus 1/4 turn for compression fittings, or manufacturer specification for threaded fittings). Ensure lines are routed correctly and not kinked or stretched. Verify connections are secure.
    ℹ️Do not over-tighten power steering line fittings as this can damage sealing surfaces and cause leaks.
12. 12

    Reconnect ball joints and stabilizer
    Lower steering knuckle assemblies back down onto ball joint studs. Install ball joint castle nuts and tighten to specification. Install new cotter pins if equipped. Reconnect sway bar end links to lower control arms, holding shaft with Allen key while tightening nuts to specification.
    Torque spec

    Ball Joint Nut110 Nm (81 lb-ft)

    Sway Bar Link Nuts55 Nm (41 lb-ft)
13. 13

    Reconnect steering shaft
    Align steering shaft coupler with steering rack pinion using reference marks made during disassembly. Ensure shaft is fully engaged and splines are properly aligned. Install coupler bolt and tighten to manufacturer specification (typically 35-40 ft-lbs, verify in service manual as not provided in torque spec list).
    ⚠Improper steering shaft alignment can cause binding, poor steering feel, or premature wear. Verify alignment marks match before tightening.
14. 14

    Install wheels and lower vehicle
    Install both front wheels and hand-tighten lug nuts in star pattern. Lower vehicle until tires just touch ground but weight is still on jack stands. Torque lug nuts to specification in star pattern. Remove jack stands and lower vehicle completely to ground.
    Torque spec

    Wheel Lug Nuts169 Nm (125 lb-ft)
15. 15

    Fill power steering system and bleed air
    Fill power steering reservoir with Motorcraft MERCON LV fluid to proper level. Start engine and turn steering wheel lock-to-lock several times slowly while checking fluid level. Top off fluid as needed. Check all power steering connections for leaks. Continue bleeding until no air bubbles are visible in reservoir and steering operates smoothly.
    ℹ️Power steering pump may be noisy initially due to air in system. Continue bleeding process until noise subsides and fluid level stabilizes.

Reassembly

1. Reconnect negative battery terminal
2. Verify steering wheel is centered and matches pre-service position
3. Check all subframe mounting bolts for proper torque after vehicle settles
4. Inspect ground under vehicle for any fluid leaks after test drive

Verification

• Test drive vehicle and verify smooth operation with no clunking, vibration, or unusual noises from front suspension
• Verify steering returns to center properly and operates smoothly through full range of motion
• Check power steering fluid level after test drive and top off if necessary
• Perform visual inspection of all work areas for proper installation and torque
• Re-check all torque specifications after 50-100 miles of driving, especially subframe mounting bolts
• Have front end alignment performed by qualified technician to ensure proper camber, caster, and toe settings

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