The AAM site is not geared toward consumers since they do not sell anything to the public. It is meant for anto manufacturers and shows products that are available to them. If Dodge decided it wanted to install 3. 55s, AAM would produce them. Same goes for all of the locker and limited slip options on the site. It looks like we should have five or six options but most of them are not available since the auto manufacturers have not purchased them.