The central axis and the exterior of the rear differential bushing are constructed with cast iron material. Highly elastic urethane filled in between the two parts. There are 60¢X and 80¢X stiffness to choose from. The bushing can increase the power output efficiency during quick acceleration and reduce the chance of unusual issue of the gear when the outer casing of rear differential is in action.
After Ruff tested the life expectancy of this bushing it can last longer than the OEM bushing. For better comfort this bushing provides little to no vibration to the body.