Have you checked if the car has aftermarket trans or engine mounts? There is a good chance that the previous owner may have installed aftermarket mounts. I installed a dogbone insert. It made the car vibrate so bad. I took it out after a couple weeks.
Also with no sound insulation out back...the noise will increase a lot. Lol...you'll hear every pebble that gets kicked up from the road. You can always all something like Dynamat to replace the sound insulation that was removed.
Also with no sound insulation out back...the noise will increase a lot. Lol...you'll hear every pebble that gets kicked up from the road. You can always all something like Dynamat to replace the sound insulation that was removed.