Re: 2002 Mustang-gc
It's very hard to give you a definitive answer without having more data. If you have access to a scan tool, hook it up and see what codes come up. From your description I'd guess you have an intermittent short/open circuit in one or more of your wheel speed sensors, a damaged tone wheel or a major issue with your ABS/Traction control module. But definitely need more data, specially dtcs, before I can point the finger somewhere.