2004 Automatic VW Jetta- been driving my sister's car for a few days and i noticed first thing in morning when taking off it feels like i ran over a body or something. Not sure if problems with transmission or not. Only felt it happen when car has sat for awhile and worse in the mornings. Any Suggestions??

A lot of newer brands of tire are very soft, to help with traction, the softness will often times cause the tires to get a mild flat spot when sitting for a short period of time. Try putting the max amount of air that the sidewall says the tire can take. If the noise goes away it is the tires causing it, i would not replace them for this problem, just reset the tires to the correct pressure and ignore the noise.

If its one big shudder and not a bunch of them it sounds like a brake is sticking. if you get a bunch of small ones it may be a bad tire(belt shifted)