Universal JointUniversal joint listed as an aftermarket replacement; contact us to verify fit before ordering for forklift driveline and steering shaft assemblies. The U-joint allows the drive shaft to transmit torque through an angle, which is what lets the engine and the axle sit at different heights. Worn U-joints show up as a clunk on direction changes, vibration at speed, or visible rust weep at the cap seals. Fleet techs replace them in pairs when one fails. Order AC081559 and provide the lift truck make, model, and serial to confirm the cross dimensions.Aftermarket replacement part, cross-references original part number AC081559.Need help confirming fit? Call (562) 693-7748 with your serial number.Part number variants: AC081559, ac081559 ⚠ Warning: Some equipment has serial-number breaks that may not be reflected in the catalog. Contact us for clarification before ordering if uncertain.SCR Forklift Parts ships from Whittier, CA with next-day delivery available across the US when needed.