A flexible coupling, often incorporating rubber or polyurethane, connects two rotating shafts while allowing for slight misalignment and dampening vibrations. Typically found in rear-wheel and all-wheel-drive vehicles, this component bridges the gap between the transmission output shaft and the differential input shaft. This design accommodates the vertical movement of the rear axle during acceleration and braking.
This crucial component contributes significantly to drivetrain longevity and passenger comfort. By absorbing shocks and vibrations, it protects other drivetrain components from premature wear and tear. It also isolates the driver and passengers from harshness, resulting in a smoother, quieter ride. Historically, simpler, less effective designs were used, which often led to increased noise, vibration, and harshness, as well as increased maintenance requirements. The evolution to more sophisticated flexible couplings has dramatically improved vehicle refinement and reliability.
