2004 Ford Excursion Gas Suspension Parts: A Complete Guide to Replacement and Upgrades

The 2004 Ford Excursion with a gas engine is a heavy-duty SUV that demands robust suspension components. Whether you're addressing sagging leaf springs, worn-out shocks, or a rough ride, choosing the right parts is critical for safety and comfort. This guide covers all major suspension parts for the gas model, including front and rear systems, common failure points, and upgrade options to help you keep your Excursion running smoothly.

Understanding the 2004 Ford Excursion Gas Suspension System

The 2004 Excursion is offered with either the 5.4L Triton V8 or the 6.8L Triton V10 gas engine. The suspension setup is similar across these gas trims, but differs from the diesel version in spring rates and load capacity. The front suspension uses a twin I-beam design with coil springs, while the rear employs a solid axle with leaf springs. Both ends rely on gas-charged shocks for damping.

Key Suspension Components

• Front: Coil springs, upper and lower ball joints, tie rod ends, sway bar links, and twin I-beam axle pivot bushings.
• Rear: Leaf springs, shackles, U-bolts, and rear shocks.
• Shocks: Gas-charged twin-tube or monotube designs. Front and rear shocks differ in length and valving.
• Steering: Pitman arm, idler arm, and drag link (part of the steering system that affects suspension feel).

Common Suspension Problems on Gas Excursions

Owners often report sagging rear leaf springs, especially if they tow or carry heavy loads. Front coil springs rarely sag but can break over time. Worn ball joints cause clunking noises and uneven tire wear. Shocks lose their damping ability after 50,000–70,000 miles, leading to a bouncy ride. Rusted sway bar links and bushings are also common in salt-belt states.

Diagnosing Worn Parts

• Visual inspection: Look for cracked or broken spring leaves, leaking shocks, and torn rubber bushings.
• Road test: Pay attention to excessive body roll, nose diving under braking, or rear squat during acceleration.
• Check ride height: Measure from the center of the wheel to the fender arch. Factory spec is around 22 inches front and 23 inches rear (approximate).

Front Suspension Parts for Gas 2004 Excursion

Coil Springs

• OEM replacement: Moog or Motorcraft offer direct fit coils. They maintain factory ride height and load capacity.
• Upgraded options: For added load support or a slight lift (1–2 inches), consider springs from Pro Comp or Skyjacker. Note that lifting may require longer shocks.

Ball Joints

• Upper and lower: Moog problem solver or AC Delco are popular choices. They come with grease fittings for long life.
• Installation tip: Pressing ball joints requires a special tool; consider having a shop do it.

Sway Bar Links and Bushings

• Links: Moog or Energy Suspension polyurethane links reduce body roll. Replace both sides at once.
• Bushings: Polyurethane upgrade kits make a noticeable difference in handling.

I-Beam Pivot Bushings

• These wear over time, causing wandering. Moog offers a complete bushing set. Installation is labor-intensive but restores alignment stability.

Rear Suspension Parts for Gas 2004 Excursion

Leaf Springs

• OEM replacement: Motorcraft or ACDelco direct fit. If your Excursion has over 100,000 miles, replacing both rear springs is wise.
• Heavy-duty or add-a-leaf: If you tow or carry heavy loads, consider add-a-leaf kits or heavy-duty springs from General Spring or Diamond. Add-a-leaf increases spring rate and ride height by about 1–1.5 inches.
• Helper springs: Air bags (e.g., Firestone Ride-Rite) are an alternative for variable loads. They require installation inside the coil or leaf spring area.

Shackles and U-Bolts

• Shackles: Inspect for rust and wear. Replace with OEM-grade or heavy-duty units.
• U-bolts: Always replace u-bolts when removing leaf springs. They stretch and can fail. Grade 8 U-bolts are recommended.

Shocks

• Front vs rear: Front shocks on gas models are typically 24.5 inches extended, rear about 20.5 inches. Confirm measurements.
• Gas vs nitrogen: Most shocks are gas-charged. Bilstein 4600 or 5100 series are popular for their monotube design and long life. Monroe Reflex or Sensa-Trac are budget-friendly options.
• Off-road: If you drive rough trails, Fox 2.0 or Rancho RS9000XL offer adjustable damping.

Steering Components Affecting Suspension

Worn steering parts can mimic suspension issues. The Pitman arm, idler arm, and drag link should be checked when diagnosing front end play. Moog and Motorcraft make direct replacements. If the steering box leaks or has excessive play, a Redhead steering gear upgrade is a common solution.

Upgrading vs. Replacing: What to Choose?

• Daily driver: Stick with OEM-quality parts for reliability and comfort. Moog and Motorcraft are trustworthy.
• Towing/hauling: Upgrade rear leaf springs or add air bags. Heavy-duty shocks like Bilstein 5100 improve control.
• Off-road: Consider a 2-inch lift kit (springs and shocks) from Skyjacker or Rough Country. Ensure proper alignment afterwards.
• Budget: Monroe shocks and basic leaf springs keep costs low. Avoid cheap no-name brands that may fail early.

Installation Considerations

• Ball joints, coil springs, and leaf springs require specialized tools. Many owners prefer a shop for these jobs.
• Shocks and sway bar links are DIY-friendly with basic hand tools.
• After installing new suspension parts, get a professional alignment. Toe and camber settings may change.
• Torque all bolts to spec: leaf spring U-bolts typically 110–150 ft-lbs, shock bolts 30–50 ft-lbs.

Part Compatibility: Gas vs. Diesel

Gas and diesel Excursions share the same suspension architecture, but diesel front springs are stiffer to handle the heavier engine. Using diesel front coils on a gas Excursion will raise the front end and ride harshly. Rear leaf springs are similar in length but may have different spring rates; diesel springs are slightly thicker. Always confirm part numbers for your specific engine (5.4L or 6.8L gas).

Where to Buy and What to Avoid

• Authorized dealers: Motorcraft parts from Ford dealers are guaranteed fit.
• Auto parts stores: NAPA, O'Reilly, and Advanced Auto carry Moog, Monroe, and other quality brands.
• Online suppliers: RockAuto and Summit Racing offer wide selections. Check shipping costs and return policies.
• What to avoid: No-name brands on auction sites; they often lack quality control and may not meet safety specs.

Final Recommendation

For most 2004 Excursion gas owners, a balanced approach works best: replace worn components with quality OEM or aftermarket equivalents such as Moog for suspension and Bilstein for shocks. If you tow regularly, invest in heavy-duty rear springs or air bags. Always replace both sides (front or rear) at the same time to maintain even handling. Stick with reputable brands and get a professional alignment after any major suspension work. Your Excursion will reward you with many more miles of reliable service.