Allison Transmission Serial Number Lookup ((free)) [2025-2027]
Once you have the S/N, you can access detailed information through these official platforms: Allison HUB™:
: If buying a used vehicle, a serial lookup can reveal if the transmission was properly registered and serviced.
The serial number typically consists of and is usually listed directly below the model number on the data plate. Leading digits often indicate the transmission series: 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. AT500/1500 Series : Starts with 321 or 9108. MT600 Series : Starts with 241 or 242. HT/CT 700 Series : Generally starts with 251. 3. How to Perform a Lookup Allison Transmission Serial Number Lookup
: On some 3000 and 4000 Product Families, the tag may be located on the driver's side (left side) near the bottom oil pan rail. Legacy and Off-Highway Models
A 10-digit number usually starting with 24 , 63 , or 65 (e.g., 2410XXXXXX ). Older models may use a 9-digit format. Once you have the S/N, you can access
Crucial for ordering parts. Model Number: E.g., 3000 RDS, 4000 Series. Build Date: When the transmission was manufactured.
An Allison identification tag contains several strings of numbers, and it is easy to confuse them. To perform an accurate lookup, you need to know what each number represents. 3000 Series : Starts with 651, 652, or 9307
: Denotes ratio coverage (0–3 for close ratio; 7–9 for deep ratio).
Disclaimer: Always rely on an authorized Allison Transmission technician for complex troubleshooting and parts verification.
: Avoid costly shipping delays caused by ordering components that do not match your exact build configuration.