Really Bad Shaking and grinding / rubbing sound after hydro swap

Hi all, i recently purchased ANOTHER hydro tranny swap from tiger japan, and had to order the hydro to cable conversion kit and tranny mount from innovative… My mechanic called me up today and said it was ready to be picked up. So i drive it home off the lot and as soon as i start accelerating, i can feel major vibration coming from what appears to be the right axle… I suspect two possibilities; Bad motor mounts OR bad axle. It could be a bad axle because i had them replaced after mine snapped and my tranny blew up… What would be the difference in symptoms of a bad motor mount vs a bad pass. side axle…?