5 Common Suspension Problems in Heavy-Duty Trucks (And How to Fix Them)

Your truck’s suspension system undergoes huge amounts of stress to maintain a smoothie and stable journey. Naturally, these are going to encounter some problems, from damage or just general wear and tear. But don’t worry, we’ve got your back.

Here are five common suspension problems in heavy-duty trucks and practical tips on how you can fix them.

Uneven Tire Wear

Uneven tire wear is one of the most noticeable signs of suspension trouble. This issue occurs when the suspension fails to evenly distribute the truck's weight across all tires. Misalignment, worn-out shocks, or damaged leaf springs can lead to this problem.

How to Fix It

1. Inspect the Tires: Check for uneven tread wear patterns, such as cupping or balding edges.
2. Realign the Wheels: Proper wheel alignment is essential for even weight distribution.
3. Replace Worn Components: If shocks, leaf springs, or bushings are damaged, replace them promptly.

Regular tire rotations and inspections can also prevent uneven wear from worsening.

Sagging or Uneven Ride Height

A sagging truck or uneven ride height is a massive indicator of compromised suspension components, like damaged leaf springs or deflated air suspension bags. When the suspension can’t maintain the correct height, it affects handling and safety.

How to Fix It

1. Inspect Leaf Springs: Look for visible cracks or excessive flattening. Replace any damaged leaf springs.
2. Check Air Bags: If the truck uses an air suspension system, check for leaks or insufficient air pressure in the bags.
3. Adjust the Load: Uneven loading can strain one side of the suspension. Ensure the cargo is evenly distributed.

Routine suspension inspections can catch these issues early, saving you from costly repairs.

Excessive Vibrations or Bouncing

Excessive vibrations or bouncing while driving can make even short trips uncomfortable and dangerous. This problem is often linked to failing shock absorbers, which are responsible for absorbing road impacts.

How to Fix It

1. Test the Shocks: Perform a bounce test by pressing down on the truck's front or rear. If it bounces more than once, the shocks are likely worn out.
2. Replace Worn Shocks: Invest in high-quality replacements designed for heavy-duty applications.
3. Inspect Mounting Hardware: Ensure bolts and brackets securing the shocks are intact and properly tightened.

Addressing this issue promptly can protect other components from undue stress caused by constant vibrations.

Steering Difficulties

If you’ve noticed your truck pulling to one side or experiencing loose steering, it’s a clear sign of suspension trouble. Worn bushings, misaligned wheels, or issues with the steering linkage typically cause this issue.

How to Fix It

1. Inspect the Steering Linkage: Check for loose or damaged tie rods and replace them if necessary.
2. Examine the Suspension Bushings: Look for cracked or deteriorated bushings and install new ones if needed.
3. Align the Wheels: Misalignment is a common culprit and can often be corrected by a professional alignment service.

Proper steering responsiveness is critical for safe handling, especially under heavy loads.

Air Suspension Leaks

Vehicles with air suspension systems are particularly vulnerable to leaks in the air bags or lines. A leaking air suspension can cause the truck to sag or fail to maintain a consistent ride height.

How to Fix It

1. Check for Leaks: Spray soapy water on the air bags and lines. Bubbles indicate a leak.
2. Replace or Patch Air Bags: Minor leaks can sometimes be patched, but severely damaged bags should be replaced.
3. Inspect the Compressor: Ensure the air compressor is functioning correctly and not overworking due to leaks.

Regular maintenance of the air suspension system can prevent leaks and extend the system’s lifespan.

Conclusion

The suspension system in heavy-duty trucks is vital to safety, handling, and load management. Regular inspections, timely repairs, and preventive maintenance are the best ways to ensure your truck’s suspension remains in peak condition. Whether addressing uneven tire wear or fixing air suspension leaks, staying proactive can save you time, money, and headaches.

If you’re experiencing any of these issues or want to schedule a suspension inspection or repair, PRS Truck Repair in Pittsburg, PA, is here to help. Reach out to us today and ensure your truck is ready for the long haul.