So, for those of you with whom I’ve been discussing the Aisin serial numbers: I have to apologize, as your theories were correct regarding how the numbering system worked. I had mistakenly typed a “3” instead of a “2” at the beginning of one of the transmission serial numbers on the tracking spreadsheet. That was throwing off what we thought might be how Aisin used their serial numbers. Indeed your hypothesis was correct. Pretty certain the Aisin serial numbers are determined as follows:
Example: “2H-1234”
First character is the last digit of year of manufacture
So in the example above the “2” would be “2022”
Second character is the month of manufacture
So in the example above “H” would be “August”
The last four characters are (I’m assuming) the sequence number. I’m still sorting that out.
I’ve cross checked this theory against multiple trucks on the tracking sheet and it worked for every one.
I appreciate those of you who have been helping to figure all of this out. The goal here continues: Find out as much about this issue as possible in the hopes of assisting others to understand this problem, as well as help others avoid dangerous situations if possible.
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