Transtar Transmission Code Guide
As explained in the Part Numbering Guide, the Base of a part number (disregarding any Prefix letters it might have), begins with a 2- or 3-digit number that signifies the transmission unit that the particular part fits. This is called the Transmission Code.
![Transtar Transmission Code Guide Transtar Transmission Code Guide](https://resources.transtar1.com/hs-fs/hubfs/standard%20transfer%20case%20unit.png?width=721&height=617&name=standard%20transfer%20case%20unit.png)