My Civic has 130,000 kms driven, Recently the car starting jerking rapidly on low speed (16-25kmph), I thought this was the issue of Spark plugs, but after getting them installed it’s still doing it, I’ve noticed that the car is jerking only on D gear, And not on S or L gear, I haven’t gotten the gear oil changed in a while and I’m gonna get it done, But could my whole gear be f’ed? Will I have to get the whole gear replaced or the problem is something else?