The Ultimate Guide to Triumph GT6 Suspension Parts: Upgrades and Maintenance

The Triumph GT6 is a classic British sports car known for its sharp styling and engaging driving dynamics. Over the years, the suspension components wear out, and many owners look to refresh or upgrade them to improve handling, ride comfort, or both. Whether you’re restoring a GT6 to original spec or building a weekend track toy, understanding the available suspension parts is essential. This guide covers the key components, upgrade considerations, and practical tips for choosing the right parts for your car.

Key Suspension Components for the Triumph GT6

The GT6 uses a front independent suspension with coil springs and a rear live axle with leaf springs. This layout offers a balance of simplicity and performance, but it also has known weaknesses that can be addressed with modern aftermarket parts.

Bushings and Mounts

Over time, rubber bushings deteriorate, causing imprecise handling and noise. Polyurethane bushings are a popular upgrade because they offer firmer control without being too harsh for street use. Common replacement areas include the front lower control arm bushings, rear trailing arm bushings, and sway bar bushings. Polyurethane also lasts longer than rubber. However, if you prioritize comfort, high-quality rubber bushings from OEM suppliers are also available.

Shocks and Struts (Dampers)

The original GT6 came with lever-arm dampers, which are now considered outdated. Many owners convert to tube shocks for better damping control and reliability. For the front, you can use a conversion kit that replaces the lever-arm units with modern coilover or separate shock and spring setups. Rear tube shock conversions also improve damping consistency. Brands like KYB, Bilstein, and Spax offer GT6-specific dampers. Gas-charged shocks provide better fade resistance on spirited drives.

Springs

Front coil springs and rear leaf springs are available in various rates. For a stock restoration, original-equivalent springs from British parts suppliers work well. For a sportier feel, stiffer springs reduce body roll and improve cornering but can stiffen the ride. Progressive-rate springs are a good compromise, offering a comfortable ride under normal conditions with increased stiffness during hard cornering. When replacing rear leaf springs, consider a set with a slight lowering to improve the car’s stance and lower the center of gravity.

Anti-Roll Bars (Sway Bars)

Upgrading the front and rear anti-roll bars is one of the most effective ways to reduce body roll. Thicker bars, often with adjustable end links, let you tune the balance between understeer and oversteer. For a street-driven GT6, a front bar upgrade alone can make a noticeable difference. For more aggressive setups, a rear bar helps rotate the car in corners. Ensure the bars come with polyurethane bushings for minimal deflection.

Steering Components

While not strictly suspension, steering parts affect how the car feels. Ball joints, tie rods, and steering rack bushings should be inspected and replaced if worn. Polyurethane rack bushings reduce play and improve steering response. Upgraded ball joints with grease fittings extend service life.

Considerations for Upgrading Your GT6 Suspension

Before buying parts, define your goals: Are you restoring to factory condition, building a daily driver with improved manners, or creating a track-focused machine? Each path requires different components.

Street vs. Performance

For a primarily street-driven GT6, prioritize ride quality and durability. Polyurethane bushings on critical points, a set of quality tube shocks, and moderate spring rate increases offer a good balance. Avoid over-stiff springs or solid bushings that transmit noise. If you drive on rough roads, stick with rubber bushings where possible.

For a car that sees track days or autocross, stiffer springs, adjustable coilovers (if converting), and heavy-duty anti-roll bars are beneficial. Adjustable shocks allow fine-tuning. Consider adding a strut brace to the front suspension towers—it stiffens the chassis and improves steering precision.

Budget and Compatibility

Suspension parts for the GT6 range widely in price. Full coilover conversion kits can be expensive, but they offer the best adjustability. On a budget, you can refresh the existing suspension with new bushings, shocks, and springs. Many parts are interchangeable with other Triumph models like the Spitfire, but verify compatibility with your chassis number. Always use parts specifically designed for the GT6 to ensure proper geometry.

Installation Tips

Replacing suspension parts on a GT6 can be done at home with basic tools, but some jobs require a spring compressor or alignment afterward. When replacing leaf springs, replace the shackle bushings and ensure the spring isn’t reversed. After any suspension work, get a professional alignment to avoid tire wear and handling issues.

Recommended Suspension Parts for Different Goals

Here are some commonly used part types for the Triumph GT6, without endorsing specific brands as the “best.”

Original Restoration

• Rubber bushings: Many suppliers offer full bushing kits.
• Lever-arm dampers: You can find reconditioned units or new ones from heritage suppliers, but expect limited adjustability.
• Standard-rate coil springs and leaf springs: Order from a reputable Triumph parts specialist.

Street Performance

• Polyurethane bushing kit: Focus on front lower control arms, rear trailing arms, and sway bar.
• Tube shock conversion: Look for a bolt-on kit with gas shocks from KYB or Bilstein.
• Lowered rear leaf springs: Typically 1-inch drop improves looks without severe ride stiffness.
• Front anti-roll bar: 7/8-inch or 1-inch diameter bar with poly bushings.

Track/ Competition

• Coilover conversion: Adjustable spring perches and damper settings allow corner weighting.
• Heavy-duty ball joints and tie rod ends: Fresh components prevent failure at high loads.
• Adjustable anti-roll bars: Front and rear with multiple mounting holes.
• Strut brace: Quality brace reduces chassis flex.

Maintenance and Common Issues

Regularly inspect suspension parts for wear. Clunks or knocking when going over bumps often indicate worn bushings or loose bolts. Check for fluid leaks from shocks. Rear leaf springs can sag over time, causing a lower stance—replace in pairs. Lubricate polyurethane bushings periodically with silicone grease to prevent squeaks.

If your GT6 has been sitting for years, assume every bushing and shock needs replacement. Do a full inspection before driving.

Final Recommendation

For most GT6 owners, a thoughtful upgrade of bushings, shocks, and springs provides the best return on investment. Start with polyurethane bushings on the front control arms and a set of quality tube shocks. If your budget allows, add a front anti-roll bar and lowered rear leaf springs. This combination sharpens handling without sacrificing daily usability. For those seeking maximum performance, a coilover conversion and full polyurethane bushing set deliver track-ready behavior. Always buy from established Triumph parts suppliers and consult with other enthusiasts in forums for fitment tips.

By refreshing your Triumph GT6 suspension with the right parts, you’ll preserve its classic character while enjoying a more confident and enjoyable driving experience.