Mazda RX-8 Aisin AZ6 (Part 2) | Complete Gearbox Assembly & Installation on Car

In this episode, I complete the full rebuild of the Aisin AZ6 gearbox from a Mazda RX-8, following a precise, engineering-focused approach and documenting each step of the process. The video shows the complete reassembly of the gearbox, starting from previously prepared and inspected components. All internal elements are installed in the correct sequence, with attention to alignment, fit, and proper seating of bearings, shafts, and synchronizers. I also cover key details that are often overlooked, including lubrication points, assembly techniques, and practical considerations that directly affect gearbox operation and durability. Beyond the internal rebuild, I continue with the installation of the gearbox back into the car. This includes positioning, mounting, reconnecting the drivetrain components, and completing the final stages of assembly such as the driveshaft and clutch-related elements. The entire process is presented in a detailed, methodical, and tutorial-style format, aimed at showing not only how to assemble this gearbox, but how to approach such work with precision and understanding of the mechanical system. This video completes the full teardown and rebuild of the Aisin AZ6 gearbox. #MazdaRX8 #AisinAZ6 #GearboxRebuild #TransmissionBuild #CarRestoration #RX8Project #ManualTransmission #Engineered #AutomotiveEngineering #DIYMechanic #WorkshopLife #CarBuild #TransmissionRepair #GearboxAssembly #RX8 Chapters: 00:00 Introduction 00:22 Components Overview 02:03 Shaft Runout Measurement 03:30 Parts Preparation 04:36 Shaft Assembly 13:21 Other Components 19:12 Gearbox Assembly 31:33 Gearbox Installation 36:32 Final Look