This comprehensive guide covers how to locate your serial number, decode the digits, and use the lookup system effectively. Why Use the Allison Transmission Serial Number Lookup?
Your transmission's serial number is far more than just a random string of numbers. It acts as a unique identifier, granting you access to a wide range of vital data and services [12†L8-L9].
Method 1: The Official Allison Transmission Parts Catalog (MyAllison)
Do not enter the transmission casting number or the vehicle identification number (VIN) into the Allison tool. The tool only accepts Allison-specific serial numbers.
If you're a service professional or need more in-depth technical data, a paid (around $350/year) unlocks significantly more features, including: Allison Transmission Serial Number Lookup
and is usually listed directly under the model number on the plate. Gears Magazine 2. How to Use the Allison Transmission Serial Number Lookup
Older highway and off-road models use a combination of letters and numbers. BK95A12 BK : Model series indicator. 95 : Year of manufacture (e.g., 1995). A12 : Sequential build code. 5. Troubleshooting Common Lookup Issues
: A 10-digit numeric sequence (for modern units). This is the primary number required for lookups.
If you have any questions or require further assistance, you can always reach out to the Allison Technical Assistance Center (TAC) at or via email at tac@allisontransmission.com . This comprehensive guide covers how to locate your
The data plate is more than just a serial number. It usually includes three key pieces of information needed for any inquiry: 10-digit number.
Once you have located the number, use these steps to retrieve your transmission data. Step 1: Visit the Official Allison HUB
| Field | What you learn | |--------|----------------| | Model | e.g., 1000, 2000, 3000, 4000, TC10, 5000/6000/8000 | | Series | e.g., RDS, PTS, MH, HS, EV | | Build date | Year/month | | Configuration | PTO openings, oil pan type, converter type | | OEM sales record | Who bought it originally | | Calibration | TCM software version |
If the transmission was factory-installed in an RV, Freightliner, International, or Peterbilt truck, the vehicle's VIN is linked to the transmission serial number. You can often call the truck dealership with your VIN to retrieve the transmission details. 5. Troubleshooting Common Lookup Issues It acts as a unique identifier, granting you
The lesson is simple: In the world of heavy-duty powertrains, a serial number is more than a label—it’s a truth-teller. Whether you are diagnosing a shift flare, verifying a rebuild, or buying used, always start with the Allison Transmission serial number lookup. It takes two minutes and can save you two years of regret.
Allison has updated its serial number structures over the decades. Understanding the format helps you quickly verify the age and origin of your unit. Modern 10-Digit Format (Standard)
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
On many modern Allison transmissions (like the 1000/2000 series found in Chevy/GMC Duramax trucks), you don't need to crawl under the truck.
: If buying a used vehicle, a serial lookup can reveal if the transmission was properly registered and serviced.
Indicates the ratio coverage (0–3 for close ratio, 4–6 for wide ratio).