Allison transmissions usually have the serial number stamped on an identification tag located on the passenger side of the transmission housing, near the output flange. 1. The Identification Tag (Most Common)
This paper examines the landscape of serial number lookup services for Allison Transmission products, assessing official and third-party resources, typical serial number formats, methods for decoding serial information (model, build date, specifications), and practical guidance for owners, technicians, and fleet managers seeking accurate drivetrain identification. It identifies reliability, accessibility, and privacy considerations, and recommends best practices for verification and record-keeping. allison transmission serial number lookup link