My 2014 RR V6 HSE has developed this new thing where you can feel a kick or thump coming from under the drivers seat ( I assume Transmission) with moderate acceleration from stop during what appears to be 2-3-4 gear changes. If I accelerate lightly, it wont do this kicking feel. Has anyone else experienced this at all? The car drives as it should otherwise. Thank you in advance for your input.

 

check you rear driveshaft support bearing