I have a 1998 Nissan Pathfinder XE-V6 engine with approximately 186,000 miles. I have taken my vehicle to several garages and/or dealerships for diagnostics but to no avail…. There is this loud, thumping, thudding sound that comes from the rear of the vehicle. This sound does not appear all of the time. It sounds as if I’ve been rammed in the back. If I hit a bump in the road or apply my brakes a certain way (I’ve learned how to control my braking so the vehicle will not make this thumping, thudding, noise). When this noise occurs, it appears as if the vehicle has been rammed in the back and the weight seems to shift toward the front. No one can seem to identify this problem…..oh, but there is a problem. My vehicle has been doing this for quite a while now. Please come to my rescue.