Is it normal, na when shifting to R or D, the car will make a sudden jerking motion or a slight nudge that will shake the car a little? It's not really a knock as in masama yung sound but the car will shake a little. I understand it might be like that when the engine is cold and the revs are at about 1.2krpm, but on normal idling at about 750, theres still a nudging motion. Is this normal? or is there something wrong with the car? and do automatic transmission fluids need to be replaced?

These shocks are evident on:
Honda City '98
Nissan Serena '02


And there are none of these shocks on:
Honda Crv '02
Honda Civic FD