Technical service manual for the Audi Multitronic® 01J continuously variable transmission (CVT), used in the 2004 A4 and A6 models with 1.8L and 3.0L engines. The document describes detailed disassembly and assembly of the transmission, highlighting unique features such as the internal location of the Transmission Control Module (TCM), the use of a drive chain instead of a belt, and the absence of a torque converter, which is replaced by a dual-mass flywheel. It includes procedures for adapting the TCM and changing the fluid.