I have a problem that i hope someone can help me with. I have a 2001 Durango Sport with a 4.7 engine. After driving for about an hour straight, when i turn off the truck, it wont start up until about an hour later, I changed the starter and battery and still the problem exist. If i hit the starter with a hammer, it starts up. It only happens when the truck is hot. No problem starting up other times. Also, if i hold the key in the start up position for a little bit, sometimes it will start up like that. When it doesn't start, there is no noise or any clicking when i turn the ignition. Please help. Thanks