If the metal tag is missing, painted over, or damaged, check the casting itself.
While the full number is needed for exact parts, the starting digits often identify the product family: Transmission Series Serial Number Starting Digits 631, 632, or 9308 3000 Series 651, 652, or 9307 4000 Series 661, 662, or 943 AT500 / AT 1500 321 or 9108 MT600 Series 241 or 242 HT 700 Series Why Serial Number Identification Matters Allison HUB™ | Allison Transmission
: Some models may have the tag on the driver's side or have the information listed on a Vehicle Identification Plate inside the operator's cab or cowl. allison transmission serial number lookup link
Older tags are usually silver or blue. Newer tags are often silver with barcode graphics.
Modern tags are silver or blue metal plates riveted to the casting. Older models may have a stamped or printed plate. 2. Identify the Number Format If the metal tag is missing, painted over,
In this long-form article, we will provide you with the direct lookup links, explain how to decode your serial number, show you where to physically find it on the transmission, and explain why you should never trust a generic parts store search without this number.
Renny printed the spec sheet and handed it to Marcus. "We need the WTEC III wiring diagram, not the standard one. Order the TCM for a 4000 series, not the 3000. If we’d relied on the VIN, we’d have ordered the wrong computer, and the boss would have had our heads." Newer tags are often silver with barcode graphics
For accurate maintenance and parts, bookmark the Allison Transmission Serial Number Lookup Link to ensure you always have the right information at your fingertips.
If the system returns an error or cannot find your transmission, verify the following details:
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