The Ultimate Guide to AMC Concord Suspension Parts

If you own an AMC Concord, you know that keeping it on the road means taking care of its suspension. The Concord, produced from 1978 to 1983, shares many components with other AMC models like the Hornet and Spirit, but finding the right suspension parts can still be a challenge. This guide covers the key suspension parts you might need, how to choose them, and what to look for when buying.

Understanding the AMC Concord Suspension System

The AMC Concord uses a conventional front suspension with upper and lower control arms, coil springs, and shock absorbers. The rear suspension is a live axle with leaf springs and separate shocks. This setup is rugged but can wear over time, leading to a bouncy ride, poor handling, or uneven tire wear.

Front Suspension Components

Coil Springs

Front coil springs support the vehicle's weight and absorb road impacts. Over decades, they can sag, causing a lower ride height and reduced suspension travel. When replacing, look for springs rated for the Concord's weight and engine size (six-cylinder or V8). Standard replacement springs are available from brands like Moog or Detroit Eaton. If you want a slight lift or stiffer ride, consider heavy-duty or variable-rate springs.

Upper and Lower Control Arms

These arms connect the steering knuckle to the frame and allow vertical wheel movement. Worn bushings or ball joints cause clunking noises and alignment issues. You can replace just the bushings if the arms are in good condition, but many opt for complete control arm assemblies with pre-installed bushings and ball joints for easier installation. Always check for compatibility: Concord lower control arms may differ between model years.

Ball Joints

Ball joints are critical for steering and suspension movement. They typically come in two types: press-in and bolt-on. The Concord uses press-in ball joints on the lower control arms and bolt-on on the uppers (on some years). If the boot is torn or there is play, replace them immediately. Brands like Moog offer greasable versions that last longer.

Shock Absorbers

Front shocks dampen spring oscillations. Monroe and KYB are common choices. For a stock ride, use gas-charged shocks; for better control, consider adjustable ones. The Concord takes a specific shock length – measure the compressed and extended lengths if in doubt.

Stabilizer Bar (Sway Bar)

The front sway bar reduces body roll. Its bushings and end links wear out, causing a loose feel. Upgrade to polyurethane bushings for improved handling without sacrificing comfort. The stock bar diameter is typically 7/8 inch, but confirm with your model.

Rear Suspension Components

Leaf Springs

Rear leaf springs support the vehicle and locate the axle. Over time, they can lose arch (sag) or develop cracks. Replacement leaf springs are available for the Concord, usually with a standard load rating. If you carry heavy loads, consider adding an extra leaf or using heavy-duty springs. Be aware that replacing leaf springs may require new U-bolts and shackle bushings.

Rear Shock Absorbers

Rear shocks are similar to front ones but usually longer. Use shocks designed for the Concord's weight and ride height. Gas shocks help control body motion on rough roads.

Shackle Bushings and Bushing Kits

Leaf springs attach to the frame with front fixed bushings and rear shackles. These rubber or polyurethane bushings wear out, leading to axle movement and noise. A bushing kit includes all needed pieces for the front and rear spring eyes.

Steering and Alignment Components

Tie Rod Ends

Inner and outer tie rod ends connect the steering rack to the wheels. Loose tie rods cause steering play and uneven tire wear. Replace in pairs and get an alignment afterward. Concord tie rods are similar to those on the AMC Hornet.

Idler Arm and Pitman Arm

On the Concord, the steering linkage includes an idler arm on the passenger side. A worn idler arm gives a wandering feel. Replace it with a heavy-duty version if available.

Sway Bar Links and Bushings

Rear sway bars are optional on the Concord; some models have them, some don't. If yours has one, replace the end links and bushings if they are cracked or loose.

Compatibility Across AMC Models

Many AMC Concord suspension parts interchange with the Hornet (1970-1977), Spirit (1979-1983), Gremlin (1970-1978), and even some Eagle components. However, there are differences:

• The Concord uses a wider track width than the Hornet in some years.
• Brake components may vary based on engine and model year.
• Control arms may have different ball joint sizes (early vs. late).

Always verify with the part manufacturer's fitment guide or by cross-referencing OEM part numbers.

Signs You Need New Suspension Parts

• Excessive bouncing after bumps
• Nose diving when braking
• Uneven tire wear (cupping, scalloping)
• Steering wheel vibration
• Clunking or squeaking over dips
• Vehicle sits lower on one side
• Poor handling or wandering

If you notice these, inspect components visually and check for play by jacking up the car and wiggling tires.

Buying Tips for AMC Concord Suspension Parts

• Stick with known brands: Moog, KYB, Monroe, Detroit Eaton, Energy Suspension for bushings. These offer reliable fit and performance.
• Check hardware: New bolts, nuts, and washers are often needed. Many kits include them.
• Consider polyurethane: For bushings and sway bar links, poly lasts longer than rubber and improves handling, though it transfers more road noise.
• Complete vs. partial repairs: If one component fails, others are likely near end of life. Replacing shocks, springs, and bushings together saves labor.
• Online fitment filters: Use parts suppliers that let you enter your car’s year, engine, and drivetrain.
• Expect OEM vs. aftermarket: NOS OEM parts are rare and expensive. Aftermarket parts are generally acceptable for normal driving.

Installation Considerations

Replacing suspension parts on an AMC Concord can be done at home with basic tools, but some jobs require spring compressors, ball joint presses, or a torch for stubborn bolts. Rear leaf spring replacement is especially heavy and potentially dangerous – support the axle securely. Always use jack stands and follow a service manual. After any work that affects alignment (control arms, tie rods, springs), you must get a professional alignment.

Final Recommendation

For most AMC Concords, start with replacing the shock absorbers and inspecting bushings. If the ride is still too soft or you have sagging, replace the springs. Use quality mid-range components from brands like Moog and KYB – they provide a good balance of cost, durability, and comfort. Avoid ultracheap or unknown brands, as they often fit poorly and wear quickly. If you plan to drive the car regularly, consider upgrading to polyurethane sway bar bushings and greasable ball joints for longer life. And always do a full alignment after replacing control arms, tie rods, or springs to protect your tires and ensure safe handling.

Restoring your Concord's suspension is one of the best investments you can make in its drivability and safety. Take your time, source the right parts, and enjoy the improved ride quality.