Dear All,
Just found out one thing, the centre bore size of the rear wheels are not matched, therefore causes all the vibrations to the body. The front one matches due to i need to use after market wheel bearing to mount the disc rotor, and the bore size at the front is 74.5 mm. The rear is 72.5 mm. We jacked the car and put the gear in D to see the movement and noticed the wheels are hopping up and down. We just need to install the right fitment of centre cone and see whether it cures this shit.
Thanks,
Ken