Allison Transmission Serial Number Lookup ((full)) Jun 2026

: Mechanics need the number to find correct wiring diagrams, torque specifications, and fluid capacities.

Typically found on the passenger side (right side) toward the rear of the transmission main housing. On some older models or marine applications, it may be on the driver’s side (left side).

The product family is identified by the first two digits of the transmission serial number. This simple decoding method allows you to quickly identify which series of transmission you are dealing with:

Your main hub for everything is . You can register for a free Basic account at hub.allisontransmission.com . With a free Basic account, you can: Allison Transmission Serial Number Lookup

When the ID tag cannot be read or is completely missing, follow this order of operations:

: A 10-digit numeric sequence (for modern units). This is the primary number required for lookups.

What are you currently trying to address? : Mechanics need the number to find correct

Once you have documented your 10-digit serial number, follow these steps to use the official Allison system:

On older transmissions, you'll typically find a stamped metal tag riveted to the side of the case. Newer transmissions (approximately 2008 and later) often use a white label affixed to the case near the oil pan split line. The tag is usually located on the side of the main transmission housing, near the rear portion of the transmission, and occasionally on the top edge of the case.

Older units may feature an 8-digit or 9-digit format. These often start with alphabetical prefixes indicating the plant location, followed by the Julian date code and sequential build numbers. 5. Frequently Asked Questions Can I look up my transmission using my VIN? The product family is identified by the first

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.

The tag is almost always located on the passenger side (right side) of the transmission oil pan.