Allison Transmission Serial Number Lookup Upd Now

Allison Transmission Serial Number Lookup — Quick Guide

Looking up an Allison transmission serial number helps identify model, build date, and compatible parts. Use this quick guide to find and decode the number and get the right service information.

The Critical "Model Number"

During your lookup, you will also need the Model Number (e.g., 29536924). This works in tandem with the Serial Number. The Model Number identifies the family and configuration; the Serial Number identifies the specific unit. Allison Transmission Serial Number Lookup

Note: Do not confuse the "Transmission ID" with the "Control Module ID." If you pull the code from a scanner, ensure you are reading the hardware serial number, not the software part number. Allison Transmission Serial Number Lookup — Quick Guide

Pitfall 2: The "Ghost" Rebuild

If a transmission was rebuilt by a third-party shop (not Allison certified), they may have swapped the housing but left the old data plate. Your serial number lookup will tell you the transmission is a 2005 model, but internally, it might have 2020 parts. In this case, trust the internal TCM data via DOC, not the plate. Pitfall 2: The "Ghost" Rebuild If a transmission

Real-World Example

A fleet manager searches serial 6510823456 and discovers the transmission was originally built for a 2019 International HV607 with a 3000 HS (high-speed) output. Without this lookup, they would have ordered a standard 3000 output shaft seal—which would leak immediately.

Part 2: Where to Find the Allison Transmission Serial Number

This is the most common point of confusion. Unlike a VIN stamped on a dashboard, Allison serial numbers are physically stamped on the transmission case. However, the location varies by series.