But you got them onto the Ipod or Iphone from the computer to begin with, via Itunes. So rather than get them from the Ipod or Iphone, just transfer from your Itunes library to a USB stick, then to your car.you can't rip anything off an iphone or ipod due to apple's agreement with the record companies. That's why you need special hacker-type programs to even get songs off an iphone from a computer.
This won't work for any music you bought that's encrypted or DRM protected. (So don't do that, then.)