Do Rear Wheels Have Shock Absorber Top Bushings?
2 Answers
All car rear wheels have shock absorber top bushings. Here are the relevant details: 1. Function of Top Bushings: The top bushing material is rubber plastic, primarily serving as a buffer and shock absorber. A well-maintained top bushing gives the sensation of the car body being lifted slightly after the tires fully land when going over speed bumps, providing excellent comfort. It also reduces direct impact forces on the car when the tires encounter uneven road surfaces. 2. Replacement of Top Bushings: The shock absorber top bushing can be replaced individually. It is necessary to check for deformation, severe wear, and cracks. It is recommended to replace both shock absorbers and top bushings as a pair to achieve balanced support on both sides. Methods to determine if the shock absorber top bushing needs replacement: Without the shock absorber, the spring rebound cannot be controlled, leading to more severe bouncing when driving on rough roads. Additionally, during cornering, the up-and-down oscillation of the springs can cause loss of tire grip and tracking performance.
After driving for half a lifetime, I often encounter shock absorber issues. The rear shock absorbers indeed have top mounts—a rubber cushion at their top—primarily serving to buffer vibrations and reduce noise. For instance, when driving over speed bumps, if you hear creaking sounds, it's likely due to aged or cracked top mounts. My last car had severe bumpiness because of a failed top mount, but after spending some money to replace it, the ride immediately became quiet and comfortable again. Remember not to wait until it completely fails; early inspection can save a lot of trouble. Additionally, top mounts typically last a few years, and frequent driving on rough roads accelerates wear. A quick check during regular maintenance ensures safety and peace of mind.
