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.
Confusing the number 0 with the letter O , or the number 1 with the letter I . Allison Transmission Serial Number Lookup
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 Do not enter the transmission casting number or
This seemingly simple string of numbers and letters is the key to unlocking the entire history, specifications, and compatibility of your unit. Without it, you risk ordering the wrong filter, using incorrect fluid specifications, or purchasing a stolen or rebuilt unit disguised as a factory original. If your transmission was rebuilt by an aftermarket
Found on the passenger side near the rear accessory drive or PTO pad.