: It is often found on the lower rear face of the rear housing.

: It may also be listed on your vehicle's identification plate (often in the cab/cowl area) or in the original vehicle order paperwork. Allison Transmission Common Series Serial Prefixes The first three digits often identify the series: Dartco Transmission 1000/2000 Series : Starts with 631, 632, or 9308. 3000 Series : Starts with 651, 652, or 9307. 4000 Series : Starts with 661, 662, or 943. to access the premium parts catalog? Allison HUB™ | Allison Transmission

: You can verify warranty coverage and historical build data using your 10-digit serial number. Service Tools & Information

If the plate is unreadable, you can sometimes find the serial number and assembly number on the Vehicle Identification Plate inside the operator's cab or cowl. Allied Systems Company or trying to check the warranty status of a specific unit? Locate Allison Transmission Serial Number