When To Replace Shocks

Am I Driving with Bad Shocks?

Shocks are an integral component of a truck's suspension system and help to keep vehicles grounded. Without shocks, both drivers and vehicles are put at risk of injury due to bouncing and swaying of vehicles on uneven terrain. Like other truck parts, shocks get worn out and need to be replaced, butwhen is a good time to do it? Keep reading to learn how long shock absorbers last on heavy-duty trucks and the warning signs of worn-out shocks.

How Long Do Shocks Last on Commercial Vehicles?

Typically, shocks should be replaced every 150,000 miles on commercial vehicles; however, some vocational vehicles may need replacements every 75,000 miles. While mileage is important, other factors to consider include the environment and other truck parts. For fleet drivers cruising in extreme weather conditions, they may need to upgrade their shock absorbers sooner than later to get them through inclement weather. Drivers planning to change tires or airbags, should add changing shocks to the list, too. Doing so will avoid premature failures and unexpected part costs.

What Do Bad Shocks Look Like?

In order to determine the bad, you must first be able to see the good. A good shock absorber will not bounce back quickly when pressed. Instead, it will gracefully move up to help stabilize vehicles while reducing road vibrations. This is just one way to test out shock absorbers. Of course, there is more to it than that…

Symptoms of Bad Shocks

Driving with bad shocks is never a good idea, and if drivers are noticing road vibrations (plus knocking, rattling and loud clanking noises from the undercarriage) and uneven tire wear, it may be time to replace the shock absorbers. Veering vehicles may require a tire alignment, butit could also be the sign of a failing shock, and, if truck drivers are taking longer to stop heavy rigs, break for new shock absorbers for easier brake capabilities. It is for the driver's safety!

Top Three Shock Failures

Weak welding quality, cracked or split rubber bushings, and excessive oil loss are some of the most common reasons why shock absorbers fail on commercial vehicles. When shopping for shocks, it is important to find quality parts that are both internally and externally welded for maximum durability. Furthermore, cracked bushings can cause the shock to break away from the mount resulting in damage to air bags and other components. Be sure to find thick shoulder bushings that are strong for increased security. Lastly, poorly designed oil seals will result in leaks. Choose chrome piston rods on shock absorbers with a double-lip seal design to keep out debris, prevent corrosion, and see less leaks.