25172118
Universal Joint
Volvo

The universal joint (U-joint) is a cornerstone of the drivetrain in Volvo heavy-duty applications, allowing for smooth transmission of power through misaligned driveshafts. This cross-and-bearing assembly accommodates angular movement between the engine, transmission, and axle, preserving driveline alignment while absorbing dynamic torque fluctuations. A robust U-joint handles high torque inputs and repetitive cycles common in highway and heavy-haul operations, resisting wear in the trunnion bearings and cross pins. Its precise fit reduces vibration and enhances steering feel, especially when the suspension traverses uneven terrain or heavy loads provoke chassis flex. Materials chosen for durability, including hardened steel and corrosion-resistant finishes, help the joint withstand exposure to road salt and temperature swings typical of long-haul routes. Correct lubrication, proper preload, and secure retaining clips ensure long-term reliability and prevent catastrophic drivetrain failure. Routine replacement is cost-effective when signs of play, squeaks, or heat are noticed. Source One Parts Center reminds technicians to match the U-joint to the vehicle’s specific model year and axle configuration.