I don't know what it is but sometimes when I'm sitting at a light it will start to shake and I let off the brake and it will stop. The motor mounts are brand new, both of them so what is it?

 

Ha! The same thing happens to me sometimes...quite irritating, and I have no idea what it is either. Hopefully someone can solve our problem..

 

how bad does it shake? if it's only light then it's normal. it is a I-4 and not perfectly ballanced. mine shakes from time to time but only slightly.

if it's significant then I'm not too sure being you replaced the motor mounts. was it the rubber you replaced in the MMs?

 

Went to Dodge and had them replace the upper and lower ones. It shakes moderate but this is the only time its done it to me in a while Last time it happened was about 6 months ago and that was when the mortor mounts were bad. But it didn'y stop so I just stuck it in neutral.

 

My car shakes the same way, I also replaced the motor mounts. I just accepted it as something that comes with the car...unless someone else has an idea...

 

I think I will do the same.