sometimes when I start my jeep it has a loud couple of bangs right at start and since yesterday there has been a ticking from the same spot from the rear of the engine which sounds louder underneath the jeep. has the 4.0 engine auto 150,xxx on the engine. I know its not an exaust leak because I just took the manifold off and welded it back together and replaced the gasket afterwords there were no noises which was about 4 days ago. When I get under the jeep and and put my hand on the bell housing it feels like something is hitting it. I am thinking the flexplate is lose or cracked any opinions.