Allison Transmission Serial Number Lookup Online

Connecting Allison DOC (Diagnostic Optimized Connection) software to the vehicle’s OBD/diagnostic port will read the serial number directly from the TCM. 2. Anatomy of an Allison Data Plate

On many Allison identification tags, a date of manufacture number is also present. This number typically follows a format such as "05J12," which decodes to November 12, 2005. The letter corresponds to the month (A = January, B = February, C = March, D = April, E = May, F = June, G = July, H = August, I = September, J = October, K = November, L = December), and the numbers represent the day and year.

Allison Transmission Serial Number Lookup: The Complete Identification Guide Allison Transmission Serial Number Lookup

Allison Transmission maintains a customer support line.

The unique sequential production number for that specific unit. Legacy Format (Older Units) This number typically follows a format such as

If your transmission was rebuilt by an aftermarket company, the original Allison tag may be missing or replaced with the rebuilder's custom serial tag. Finding an Authorized Allison Dealer

: Place a piece of paper over the raised text and rub a lead pencil gently across it to reveal faded stampings. The unique sequential production number for that specific

Once you locate and write down the 10-digit serial number, you can retrieve the build data sheet using official or authorized channels. Step 1: Use the Official Allison HUB

If you’re on a job site without laptop access, use the software—but that requires a dealer license. For quick checks:

Your local Allison authorized distributor or dealer is another excellent resource for serial number lookup. When contacting them, be prepared to provide:

You cannot just "Google" an Allison serial number and get a build sheet. The data is proprietary, but there are tiers of access.