Dejan

I was wondering if it'd normal for the gear stick to have a slight movement when it's in 3rd or 4th gear. It moves about 8mm with acceleration and deceleration. I replaced 2 engine mounts, the third one (under the battery) seemed ok so I decided not to replace. The gear stick still have a bit of movement. I'm wondering if I should replace the third engine mount and if it would make any improvements or this is normal thing with nissan cars.