Ford or GM? I hear many car enthusiasts refer to Chrysler (the cars) as Mopar, which is the parts and service arm of Chrysler Corporation. Example: "I have a few Mopar's, a 73 Challenger , 73 Barracuda , 68 Charger and I am currently working on a 68 Coronet." Ford Motor Company's is Motorcraft, and GM's is Goodwrench. No one ever refers to a Ford as a Motorcraft nor does anyone refer to GM as a Goodwrench. Why is this?