Right-hand or left-hand side of the main case, stamped directly into a flat machined boss. Alternative Lookup Methods
: Check the rear cover or right-rear side of the main housing.
Once you have the 10-digit number, you can use it to retrieve specific data about your unit:
An provides a direct, foolproof window into your specific unit's build history, exact model designation, and original factory specifications. This comprehensive guide covers how to find your serial number, how to decode it, and how to use it to keep your vehicle running smoothly. Why You Need an Allison Transmission Serial Number
Keep your Allison running right—one serial number at a time. Allison Transmission Serial Number Lookup
Here is how to decode the date code found on many Allison data plates, often formatted as YYMnn :
To help find the exact specifications or parts for your transmission, tell me: The from your tag (if you have it) The truck or vehicle model it is installed in
required for modern electronic control modules. Without this data, technicians risk installing incompatible parts that could lead to "limp mode" or internal damage. JustAnswer Allison HUB™ | Allison Transmission
The unique sequential production number for that specific unit. Legacy Format (Older Units) Right-hand or left-hand side of the main case,
Manufacturers tie safety recalls and Technical Service Bulletins (TSBs) directly to specific blocks of serial numbers. How to Find Your Allison Transmission Serial Number
The most reliable way to find the serial number is by locating the transmission data plate (nameplate) attached to the unit's housing.
The Ultimate Guide to Allison Transmission Serial Number Lookup
Identifying your Allison Transmission via its serial number is the most reliable way to access accurate parts lists, service manuals, and warranty information. The serial number is a unique 10-digit identifier assigned to every unit during manufacturing. Locating the Serial Number This comprehensive guide covers how to find your
Understanding the digit structure helps you verify that you have located the correct number sequence on a dirty or damaged tag. Modern 10-Digit Format
Modern Allison ID tags are usually silver with black text, though older models may feature blue or green tags. The tag contains several key pieces of data:
Before you can look it up, you need to find it. The serial number is typically located on a data tag (ID plate) attached to the transmission housing. Most often found on the passenger side of the transmission. On some models, it may be on the driver's side or the lower rear face of the rear housing. Alternative Spots: Some vehicles list the transmission code on a decal on the driver's side door post Identifying the Number: An Allison serial number is typically 10 digits long
An online look-up generates a comprehensive build sheet displaying: Exact date of manufacture. Original warranty registration status.