Collection: Auto - Man Trans Synchro

Eliminate gear grinding and restore effortless shifting with our selection of Auto Man Trans Synchro components. At DIY Customs, we provide high-friction brass and carbon synchronizer rings, durable synchro hubs and sleeves, specialized synchro keys and springs, and complete synchro repair kits designed for a perfect fit. Whether you are rebuilding a high-performance gearbox for faster shifts, replacing worn-out rings in a daily driver, or restoring a classic transmission, our professional-grade hardware offers the mechanical synchronization and durability you need at unbeatable prices. From specialized multi-piece cone assemblies to direct-fit kits for popular T-5, T-56, and NV series transmissions, we carry the essential gear for every internal gearbox repair. Don't see the specific tooth count, material (brass/carbon), or specialized synchro part for your manual transmission? Hit the live chat or call 412-882-8346—we can special order and drop-ship exactly what you are looking for directly to your doorstep!