Internal valves, filters, and electronics vary by production year and assembly line.
The Ultimate Guide to Allison Transmission Serial Number Lookup Allison Transmission Serial Number Lookup
Allison has transitioned through a few serial number formats over the decades. Understanding your format helps ensure you copy down the right amount of digits. Modern 10-Digit Format (Current Production) Internal valves, filters, and electronics vary by production
Right-hand (passenger) side of the main housing, near the rear extension housing. Garbage trucks, dump trucks, regional haulers, motorhomes the model name provides general specifications:
While the serial number is unique, the model name provides general specifications: