Complete Guide to 1991 Explorer Front Suspension Parts

The front suspension on a 1991 Ford Explorer is a critical system that affects ride comfort, handling, and safety. Over time, components wear out due to age, mileage, and road conditions. Whether you're restoring your Explorer or just need to replace a worn part, understanding the front suspension system helps you make informed choices. This guide covers the key parts, common failure points, and tips for selecting replacements.

Understanding the Front Suspension System on a 1991 Ford Explorer

The 1991 Explorer uses a twin-traction beam (TTB) independent front suspension. This design uses two forged I-beams, each pivoting on a frame crossmember. Key components include:

• Upper and lower control arms – The lower control arm is part of the I-beam; the upper control arm connects the steering knuckle to the frame.
• Ball joints – There are typically two per side: upper and lower. They allow the steering knuckle to pivot.
• Coil springs – Support the vehicle weight and absorb road shocks.
• Shock absorbers – Control spring movement and dampen oscillations.
• Sway bar (stabilizer bar) – Reduces body roll during cornering.
• Steering linkage – Includes tie rods, pitman arm, and idler arm.
• Radius arms – Locate the front axle fore-aft and control caster.

Common Symptoms of Worn Front Suspension

• Clunking or popping noises when turning or going over bumps indicate worn ball joints or control arm bushings.
• Excessive steering wheel play or wandering often points to worn tie rods or steering box.
• Uneven tire wear can be caused by worn ball joints or misalignment due to sagging springs.
• Vehicle pulls to one side while braking may be a sign of worn lower ball joints.
• Front end feels loose or shaky at highway speeds.

Choosing Replacement Parts

OEM vs Aftermarket

OEM (Original Equipment Manufacturer) parts are identical to what came on the Explorer. They are reliable but can be more expensive and sometimes discontinued. Aftermarket parts vary in quality—some are OEM-equivalent, others are heavy-duty or performance-oriented. For daily driving, quality aftermarket parts (Moog, Raybestos, TRW) are often a good balance of cost and durability.

Material and Build Quality

Look for forged steel control arms over stamped steel for better strength. Ball joints should have a grease fitting to allow lubrication. Coil springs should match the original spring rate to maintain ride height; variable-rate springs can improve ride quality. Shock absorbers: consider gas-charged units (e.g., Monroe, KYB) for better control.

Budget Considerations

You can replace individual parts as they wear, but many owners opt for a complete front end kit. Kits include control arms, ball joints, tie rods, sway bar links, and sometimes springs. They save time and ensure all wear items are replaced together. Prices range from $150–$400 for a basic kit to $600+ for premium components.

Replacing Front Suspension Parts: What You Need to Know

Replacing front suspension on a 1991 Explorer is a DIY-friendly job for someone with mechanical experience. However, some tasks require specialized tools.

Tools Required

• Jack and jack stands (safety first)
• Ball joint press or pickle fork
• Torque wrench
• Socket set (metric and SAE)
• Spring compressor (if removing coil springs)
• Tie rod puller
• Pry bars, wrenches, and penetrating oil

Safety Precautions

• Always support the vehicle on jack stands, never just the jack.
• Coil springs are under tension; use a spring compressor when removing them.
• Wear safety glasses and gloves.
• Use penetrating oil on stubborn bolts the night before.

Step-by-Step Overview

1. Raise and secure the front of the vehicle, remove wheels.
2. Remove the brake caliper and rotor if needed (for ball joint access).
3. Disconnect sway bar links, radius arm, and steering linkage.
4. Remove the coil spring using a spring compressor.
5. Unbolt the lower ball joint from the knuckle.
6. Remove the upper control arm, ball joint, or entire I-beam.
7. Install new parts in reverse order, torquing bolts to factory specifications.
8. Check and adjust toe-in after assembly (alignment recommended).

Top Replacement Parts for 1991 Explorer Front Suspension

Control Arms and Ball Joints

Moog offers problem-solving parts with greasable ball joints and durable bushings. Their CK-series control arms come pre-assembled with ball joints and bushings, simplifying installation. For budget builds, Duralast or ACDelco are decent choices. Avoid cheap no-name brands—failure can be dangerous.

Coil Springs and Struts (Shocks)

Coil springs: Moog CC-series or OEM replacements from Ford. For a slight lift, consider Skyjacker or Rough Country springs (1–2 inches). Shocks: Monroe Gas-Magnum or KYB Gas-a-Just are excellent for stock ride. For off-road use, Bilstein 5100 series provide superior damping.

Steering Components

Tie rods, pitman arm, and idler arm: Moog again is a top choice. Consider a complete steering linkage kit to address all play. The idler arm is a common weak point on the TTB front end.

Final Recommendation

For most 1991 Explorer owners, a complete front end kit from Moog is the best value. It includes all necessary wear items, uses quality materials, and comes with greasable fittings. Pair it with Monroe shocks and a steering linkage kit. This combination restores factory-like handling and lasts many years. If you drive off-road or carry heavy loads, upgrade to heavy-duty springs and Bilstein shocks. Budget-conscious buyers can use Duralast control arms and tie rods, but expect shorter service life. Always get a professional alignment after any suspension work—it extends tire life and ensures safe driving.