shock bushing's job is to absorb some of the friction the banging and clanking parts of a rumbling automobile emit.
Some More About Bushings
The process of bushings.
Bushings, rubber as they are, are vulnerable to extreme temperatures and degradation via water and oils inherent to the undercarriage of a car or truck. Synthetic rubbers have longer lifespans, but maintenance and upkeep will always be necessary.
