Allison Transmission - Serial Number Lookup

A 10-digit number starting with 230 (e.g., 230XXXXXXX ). This represents the exact build configuration of the hardware.

Right-hand side of the main case, near the center or toward the rear output section. Older commercial vehicles and buses

As a service technician, I see these mistakes daily. Do not fall into these traps. Allison Transmission Serial Number Lookup

Marco was a used truck broker who thought he had seen it all. When a sleek, silver 2018 highway tractor rolled onto his lot with a "rebuilt transmission" scrawled on the bill of sale, he felt a familiar twinge of doubt. The seller, a fast-talking owner-operator, claimed the Allison 4000 Series had just 20,000 miles on a factory-certified rebuild. But the price was almost too good.

Located on the passenger side, right on the main middle housing. A 10-digit number starting with 230 (e

Pinpoints the precise engineering generation of your unit.

Typically found on the passenger side (right side) toward the rear of the transmission main housing. On some older models or marine applications, it may be on the driver’s side (left side). Older commercial vehicles and buses As a service

The serial number is stamped on a metal data plate fixed to the transmission housing. The location of this plate changes depending on the transmission generation and series. On Highway Models (1000, 2000, 3000, 4000 Series)

To help find the exact specifications or parts for your transmission, tell me: The from your tag (if you have it) The truck or vehicle model it is installed in

A 10-digit number. Modern serial numbers usually begin with 241 or 651 (e.g., 241XXXXXXX ).

A precise lookup is essential because identical-looking transmission models often have internal hardware or programming variations that make them non-interchangeable.