Xcalliber

Xcalliber is a US-based manufacturer and distributor operating from Brookfield, CT, specializing in Allison® brand transmission parts and renewed transmissions. With over 40 years of experience, the company functions as an independent manufacturer and supplier, offering contract manufacturing services. Xcalliber maintains a comprehensive inventory for GM Duramax Trucks and various Commercial Vehicles, providing both stock and performance parts, as well as renewed and performance-upgraded transmissions. Their product range includes rebuild kits, clutches, filters, bearings, torque converters, valve bodies, electrical components, and specialty tools for a wide array of Allison® models. Renewed transmissions undergo dynamometer testing and come with a warranty. The company holds certifications from APRA, ATRA, and SEMA, and also distributes products from other brands such as Mishimoto, Bosch, and Borgwarner.