Allison Transmission Serial Number Lookup Online

The serial number is stamped onto a metal data plate fixed to the transmission housing. The location of this plate depends on the transmission series. The Metal Data Plate

If a transmission was rebuilt by a third-party shop (not Allison certified), they may have swapped the housing but left the old data plate. Your serial number lookup will tell you the transmission is a 2005 model, but internally, it might have 2020 parts. In this case, trust the internal TCM data via DOC, not the plate.

: Indicates assembly in Szombathely, Hungary. How to Perform an Allison Transmission Serial Number Lookup

This due diligence can prevent costly surprises after the purchase is complete. Allison Transmission Serial Number Lookup

: Check the rear cover or right-rear side of the main housing.

: Signifies specific features or model differentiators like "Park" settings. 4. When to Perform a Lookup

While placement varies slightly by series, the ID tag can generally be found in the following areas: The serial number is stamped onto a metal

This is the gold standard. Allison’s ePortal is a web-based platform for distributors and large fleets.

Older serial numbers often start with letters denoting the manufacturing plant or series architecture (e.g., prefixes starting with BK , DA , or 00 ).

"Need help identifying my Allison transmission — found this ID plate but not sure how to decode it. S/N: [paste full serial]. Truck: [year/make/model], VIN: [last 8 digits]. Any guidance on model family and compatible parts would be appreciated!" Your serial number lookup will tell you the

For professional users, upgrading to Allison HUB Premium unlocks the full potential of the serial number—unit history, detailed parts catalogs, and comprehensive technical publications. And when physical access is impossible or the tag is damaged, remember that your VIN and diagnostic software can serve as reliable backup methods.

While the exact position can vary slightly by model, the ID tag is generally located on the main housing of the transmission. You will likely need to safely crawl under the vehicle to find it. Here are the most common locations: