When I accerlate from 0 to say 10mph, I hear this noise coming from the right(passenger side) and it desapears. Then, when i driving in the freeway, the right side shacks. My dad was in passenger seat last night and he said it could be the tranny.

I know for sure it is not the tires because I just bought new set of tires from goodyear.

what do you guys say

 

Sounds like a busted Engine mount to me... Hows the gear shifting? If gears shift smoothly, I doubt its your tranny. Have the gears ever slipped before?