Loose engine or transmission mounting bolts?

[78F350]

Originally Posted by itsnotanova

With that many miles you may want to check your transmission mounts too. That's real easy to check. Where the transmission mounting brackets meet the transmission mount is a large bolt. Look up that bolt and see if any fluid is leaking out. Leaking=BAD. You'll probably have some suspension pieces that are bad too

Here's an illustration to go with what Woody said. Looking up at the left rear mount, tiptronic at 175,000 miles:



Loose mounting bolts? I think that is unlikely unless someone worked on the car and did not torque them correctly. They will not loosen on their own if installed correctly, but worn out mounts are fairly common, especially the engine mount.

+1 on the suspension having worn pieces.