The answer to this question depends on the date of manufacture of the vehicle. This date can be found on the driver side door jamb. If the 2004 Crossfire was built before 10/1/2003, the 7/70 transfers automatically to any subsequent owners without any additional paperwork or fees. There is a $100 deductible for covered repairs though. If the car was built on or after 10/1/2003, the powertrain warranty is transferable only to the 2nd owner (not to third or subsequent owners) and the transfer has to be made in writing by a Chrysler dealer within 30 days of the date of your purchase. There would also be a $150 transfer fee you would have to pay. There are a few other limitations or restrictions so the best thing to do is read the warranty booklet that came with the vehicle, provided it's there.

On Chrysler's website they have a pdf of the warranty coverage you can download. However, there were two distinct warranty coverages as explained above, but Chrysler only has the latter manual on their site.

I hope this helps.