Allison Transmission Serial Number Lookup May 2026

(right side) of the transmission housing. It is typically located on a metal data plate or tag attached to the lower rear face of the rear housing. Alternative Locations : You may also find the serial number on the Vehicle Identification Plate

📍 : On 1000/2000 Series, the tag is usually on the passenger side. On 3000/4000 Series, it is often near the rear or bottom of the main case. Allison Transmission Serial Number Lookup