Once you've located and cleaned off the ID tag, you can start to understand what the numbers and codes mean. While a full lookup using the serial number is the most comprehensive method, the data plate itself contains a wealth of information that you can interpret directly.
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Every Allison transmission is assigned a unique 10-digit serial number. This number acts as a "fingerprint" that identifies the specific model, manufacturing plant, and production sequence. Traditionally, these numbers are found on a metal nameplate (data tag) bolted to the transmission housing, typically on the right or rear side depending on the series. Why the Lookup Matters Allison Transmission Serial Number Lookup
Confirms the exact fluid capacity and fluid type (such as TES 295 or TES 668) required for your build. 2. How to Locate Your Allison Serial Number
: The specific parts list configuration used to build the transmission. Once you've located and cleaned off the ID
: The SN reveals the "Assembly Part Number," which dictates how the transmission was programmed and geared for its specific vehicle.
Every Allison transmission is built for specific vehicle vocations, torque limits, and gear ratios. Relying on the vehicle make and model year is often not enough to find the right replacement parts. This link or copies made by others cannot be deleted
Commonly found in Chevrolet/GMC HD pickup trucks and medium-duty box trucks. The tag is typically located on the passenger side (right side) of the transmission case, near the rear toward the tailshaft housing.