Supercars are not even close to the same market. I am talking about the one being discussed here where the real world people live. Let's say someone gets an SXT today. And they order some combination of options like a V6 with a 3:07 rear. That is not something people normally do on the V6 to begin with. Then they add an automatic. Now they have a car that is only one of 21 out of the 27,000 sold. In the day that would have been considered a rare options car and brought big money. Not anymore. Twenty years from now that will just be a used Dodge.
AFAIK, each engine/trans combination has only one gear ratio...options tend to be rather limited, especially on the higher-trim cars.
Thank you for adding the AFAIK. The option sheets do allow you to order almost anything you want. It just costs a ridiculous amount of money. I used that example because I have a friend with a V6 3:07. He thought getting that combination would make his car go up in value. It hasn't.