2001 7.3 4x4, 35" tires, I have an oil leak on top of motor dripping down back of motor by the bell housing. Oil leak is not the issue Im worried about right now. Going down the highway its getting on driveshaft and everything else. Im getting a bad vibration around 40 MPH but if I engage the brake it stops. I think the oil is causing it. I dont know if its off balancing the driveshaft. Im 600 miles from home. Just need to know what step to take.
