RIGHT DROP CASE ASSY. RACE CASE GM TRANS ONLY

Upgrade or modify your drivetrain with transmission and transfer case adapter kits from Advance Adapters. Factory transmissions and transfer cases are typically designed to work only in their original pairing, which limits flexibility when upgrading or swapping components. A transmission transfer case adapter bridges that gap, ensuring proper alignment, reliable power transfer, and long-term durability. Whether you’re installing a stronger transmission, switching from manual to automatic, or upgrading to an aftermarket transfer case, the right adapter kit makes the conversion clean, efficient, and dependable. With over 50 years of drivetrain engineering experience, Advance Adapters designs and manufactures U.S.-made transmission and transfer case adapters built for precision fitment and long-term reliability. Each transmission and transfer case adapter kit includes the necessary components, adapter housings, couplers, splines, seals, and hardware, precision-machined from premium materials for strength and reliability. Detailed fitment information is provided for every kit, along with guidance on identifying your transmission and transfer case and noting any required component relocation.