Pardon my ignorance if this subject has been well vetted on this site. If it has, then direct me to the URL.
I am considering the purchase of a 1999 MX-5. Specific to the 1999, what is the best way to tell if it has a torsen diff. I know on a test drive I can put the rear wheels in different traction scenarios (i.e. grass/gravel, vs pavement) drop the clutch and look for a rubber patch on the pavement.
Since I will be travelling possibly several hundred miles for test drive or purchase, is there another way to tell if it has torsen (i.e. option package, VIN, have the seller take a few pics of the diff)?