1. I think I’ve figured this thing out but wouldn’t bet on it just think this is the way it’s set up.
2. It’s by year maybe, if yours was dated Nov 01 and it’s 02Q then the sequence is: 97K, 98L, 99M, 00N, 01P, 02Q (the “O” is not used like the VIN because the confusion with zero). The books are printed a year before…
3. This sounds logical to me what do you think?
4. If you say your book list only the newer classes I wonder if they still apply to the older cars. That’s why maybe you have the ATF argument as you have mentioned with old and new cars.
Your brothers in arms
Thai GI