But when this sort of thing happens my mechanic has it up on the rack to push, pull on suspension and drive train parts to see if there is movement or give where there shouldn't be or visible signs of the issue.
My vehicle (suv) feels like I drove over something on a fast acceleration from a stop. This only happens when stopped and a quick acceleration. If I accelerate slowly it doesnt happen. Everything else seems fine. No check engine light on and 300,000 kms on vehicle.