Type your 10-digit serial number without spaces, dashes, or letters.
If you do not have a MyAllison account, any authorized Allison distributor or dealer can run the serial number through their internal system. They can instantly print a "Build Sheet" that lists every internal component group installed in your transmission on the day it left the factory. Summary Checklist for Fleet Maintenance
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.
Spray the metal tag with brake cleaner and wipe gently; do not use wire brushes as they erase the printed text. Allison Transmission Serial Number Lookup
Access the or MyAllison login portal (many public lookup tools are freely available without a premium subscription). Locate the Serial Number Search bar.
Tip: If the metal tag is missing, painted over, or corroded, look for the serial number digitally. A technician can pull the serial number directly from the Transmission Control Module (TCM) using diagnostic software like Allison DOC. Decoding the Allison Serial Number Format
The serial number had just exposed a lie. The transmission was original, not rebuilt. Marco walked away from the deal. Type your 10-digit serial number without spaces, dashes,
If you have a specific number you're trying to decode, let me know! To help you further, I can:
Marco knew that with Allison transmissions, the truth wasn't in the seller’s handshake—it was stamped on a small, rectangular metal plate.
: It is typically found on the side of the transmission, often on the lower rear face or the passenger side. Alternative Locations Summary Checklist for Fleet Maintenance Do not enter
Confirms whether your unit requires TES 295, TES 668, or other specialized fluids.
Do you have any from your tag you need help identifying?