Sonnax Products

Upgrade your transmission with Sonnax performance-engineered components, trusted by professional builders and remanufacturers worldwide. Our Sonnax Products Collection includes the brand’s most popular and proven upgrades—valve body kits, solenoids, billet shafts, bushings, sleeves, pressure regulator valves, reaction shells, and servo components—all designed to correct common wear issues and deliver superior hydraulic control.

Sonnax is known for developing innovative solutions to transmission problems, improving both durability and drivability across a wide range of units including 4L60E, 4L80E, 6L80, 68RFE, 10R80, 5R55, and Allison 1000. Each part is precision-machined and rigorously tested to meet or exceed OEM performance, making Sonnax the go-to choice for performance, heavy-duty, and towing applications.

Whether you’re rebuilding a transmission for power, reliability, or efficiency, these Sonnax components provide enhanced oil flow, better pressure stability, and longer service life—helping you build transmissions that last.