the fwd bias of the mazdaspeed would slightly help prevent the rear from taking damage, you can tow up to a ton and a half with cars like this, its been done. 5 grownups in the car = a ton. (all my friends are big) and the design of the trailer hitch itself is for the preservation and control of the rear. and not everyone babies their mileage, i'm out of warrantee, and the new extended warrantees cover everything that the factory doesn't if you design the right kind. yo guys, here's 14 extra dollars a month, cover my rear diff and axles, they are known to be weak on the speed 6, oh you already knew that? thanks. done.