We are about to sell my wifes 04 mustang conv to her neice. we bought it used. it was a "ford certified" used car and came with a 7/75 warranty from ford at no cost to us. my question is if the warranty is transferable or not?

 

No need to transfer it, it goes with the vehicle regardless of the owner. Its the same concept as the original factory 3/36 warranty. Now if you bought an "upgrade" to the powertrain warranty then that would have to be transferred.