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
"Because half the sites out there are scraper sites or parts sellers trying to get your email," Renny said, clicking the official Allison Hub link. "You go to the source. The Source is God." allison transmission serial number lookup link
Typing “Allison transmission part” into a search engine returns millions of vague results. However, typing the correct takes you directly to OEM-accurate data. Here is what a proper lookup provides: The Data Plate (Primary): Look on the side