Collection: Auto - Manual Trans Rebuild Kit

Bring your gearbox back to life and eliminate grinds with our selection of Auto Manual Trans Rebuild Kit components. At DIY Customs, we provide comprehensive master rebuild kits featuring high-precision bearings, durable synchronizer rings, specialized gaskets, and heavy-duty oil seals designed for a perfect fit. Whether you are performing a budget-friendly "bearings and seals" refresh, a complete master overhaul including synchros and small parts, or a performance-oriented build for higher horsepower, our professional-grade kits offer the mechanical reliability and smooth engagement you need at unbeatable prices. From specialized shim kits to direct-fit rebuild sets for popular Tremec, NV4500, T-5, and Getrag transmissions, we carry the essential gear for every major gearbox project. Don't see the specific bearing brand, synchro material (brass/carbon), or specialized rebuild kit for your 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!