Link — Allison Transmission Serial Number Lookup Link

Legacy units manufactured before the late 1990s or early 2000s often use a 12-digit format, which typically begins with a prefix like BK or 21 (e.g., BK94XXXXXX ). Official Allison Transmission Serial Number Lookup Links

Before using the online lookup link, you must locate the physical identification tag on your transmission housing. 1. Locate the Metal ID Tag allison transmission serial number lookup link

Allison securely rivets a small, rectangular metal data plate directly to the transmission case. Legacy units manufactured before the late 1990s or

"Transmission Tracker"