Hi! new to the forum as of today. Lately, when I pull up to a stoplight, my car vibrates relatively violently. Now, it varies sometimes as the shake will be worse some days and on rare occasions, there is very little to no vibration at all. Normally the shaking isn't bad when I leave in the morning, but is shaking when I pull into work after my 35 minute commute. Already had the throttle body cleaned about a week ago as I was having an issue with the car shuttering as I came to a stop and the headlights going dimmer. Thinking it may be a motor mount but would the vibration vary in that case? Any Ideas?