Genuine OEM Audi Gearbox Locking Sleeve, part number 0B1301242J. This sleeve plays a crucial role in the gearbox by securing internal components, contributing to precise gear selection and preventing unintended disengagement. It is typically found within the transmission assembly, interacting with shift forks or other locking mechanisms. Constructed from durable metal, it weighs approximately 0.2 kg and measures 0.24 m in length. Using a genuine OEM locking sleeve ensures the correct dimensions, material hardness, and spring tension for reliable and consistent gearbox operation.