1966 Ford Mustang Suspension: Restoration and Upgrades

Key Takeaways

• 60-year-old suspension components are worn out and compromise handling and safety
• Replace bushings, ball joints, and springs whether restoring stock or upgrading
• Polyurethane bushings sharpen handling; rubber bushings maintain original ride
• Shocks are the most overlooked upgrade for immediate improvement
• Find suspension parts in the Front Axle, Springs, and Steering sections at classicpartspro.com

The 1966 Ford Mustang is an icon, but after nearly 60 years on the road, the suspension needs attention. Whether you want factory-correct restoration or tighter handling for real driving, dialing in the suspension is critical to getting your Mustang to drive the way it should. This guide covers common problems, restoration tips, and smart upgrade paths.

Factory 1966 Mustang Suspension

From the factory, the 1966 Mustang came with a straightforward setup.

• Front: Independent suspension with upper and lower control arms, coil springs, shock absorbers, and a sway bar (optional on some trims)
• Rear: Solid axle with semi-elliptic leaf springs and shocks

It was simple and effective for its time. But age, wear, and outdated materials seriously compromise ride quality and safety.

Common Suspension Problems

If your Mustang still has original or decades-old components, you will likely see some of these:

• Worn rubber bushings causing sloppy steering and clunks
• Sagging coil and leaf springs creating uneven ride height
• Leaking or dead shocks reducing control and stability
• Loose ball joints and tie rods making steering vague
• Excessive body roll from weak or missing sway bars

These issues affect more than comfort. They impact braking, handling, and tire wear.

Stock vs. Upgraded: Decide Your Goal

Before ordering parts, decide what you want from the car.

• Factory-correct restoration: Ideal for concours builds or collectors
• Stock appearance with modern performance: Best of both worlds
• Performance-focused restomod: Improved handling and drivability

Front Suspension Restoration

Control Arm Bushings and Ball Joints

The upper and lower control arms are foundational to proper alignment and steering response. Original rubber bushings deteriorate over time.

• OEM-style rubber bushings for stock restoration and original ride feel
• Polyurethane bushings for sharper handling and longer life

Complete front suspension rebuild kits include bushings, ball joints, and hardware. They save time and eliminate guesswork.

Coil Springs

Front coil springs sag unevenly after years of use, especially on V8 cars. Match springs to your engine weight: inline-six springs are different from small-block V8 springs.

Pro tip: Consider slightly higher-rate springs for improved handling without sacrificing ride quality.

Sway Bar

Many 1966 Mustangs came with small or no front sway bars. A larger sway bar dramatically reduces body roll and improves cornering confidence. Bolt-on kits fit factory mounting points.

Rear Suspension Restoration

Leaf Springs

Original leaf springs lose tension over time, even if they look okay. New leaf springs restore proper ride height, axle control, and traction.

Choose mid-eye or reverse-eye springs if you want a subtle drop without cutting or modifying.

Shackles and Bushings

Worn rear shackles and bushings cause clunks, wheel hop, and poor alignment. Rear suspension kits include shackles, bushings, and hardware specifically for 1965-1966 Mustangs.

Shocks: The Most Overlooked Upgrade

Shocks control spring movement. Worn shocks allow the car to wallow, bounce, and feel loose.

• Stock-style hydraulic shocks for factory feel
• Gas-charged shocks for firmer control and improved handling

Upgrading shocks is one of the fastest ways to make your Mustang feel newer without changing its character.

Alignment: The Final Step

Once suspension components are replaced, professional alignment is mandatory. Many restorers use:

• Slightly increased positive caster for better high-speed stability
• Mild negative camber for improved cornering grip
• Factory toe specifications for even tire wear

Safety note: Do not skip the alignment. Worn components hide alignment problems that become obvious after rebuild.

What to Do Next

• Inspect current bushings, ball joints, and tie rod ends for play
• Check ride height at all four corners to identify sagging springs
• Push down on each corner and watch for excessive bouncing (worn shocks)

Browse the Front Axle, Springs, and Steering sections at classicpartspro.com to find complete suspension kits and individual components for your 1966 Mustang. Enter your year, make, and model to filter parts that fit. Contact support if you have questions about stock vs. upgraded components.