AAD Drivetrain Systems specializes in Allison transmission integration harness designs and manufactures wiring harnesses for commercial trucks and specialized applications, engineered to perform in the most demanding fleet environments.

From cab, chassis, and transmission harnesses through to bespoke builds, we ensure every wiring solution is tailored to your vehicle’s specifications and usage context. Built with advanced quality standards and rigorous durability testing, our harnesses serve fleets, OEM Quality Partss, specialty vehicle builders, and heavy‑duty service providers with reliability, safety, and long life.