Bro I had same problem with my 7th Gen and after alot of investigation I came to know that balancing was not done properly by last 3 places, famous of town (Never tried Honda3S). Wheel & Wheels I-9 Chowk Islbd found incorrect balancing and did again and after that problem completely vanished. You can give a try by checking with them.
Is it happening all the way between Islamabad and Peshawar? As M2 between Islamabad and Balkassar, some places all cars starts vibrating due to road, you change lane and vibrations disappear or they will go after few kilometers.