Also check the mount under the crank pulley has not separated. Carefully jack the engine on the RH end under the oil pan. Use a piece of wood to spread the load.

Remove the RH front wheel and then slowly raise the engine and check if the rubber and metal section of the mount has separated.

Neil ...

Will do Neil. You guys rule and could have saved me hundreds if I started here in the first place!

Ordered the lower/upper torque mounts since I know those need changed. I'll check that lower mount and the remainder during install.

Sweet! I had suspected the torque mounts were the issue. I'll check their condition and replace them. I suspect it wasn't done after the trans replacement.

Hopefully the weather fairs well over the next couple of weeks, and I'll sneak in some time to wrench it out.

Thanks Jimmy.

Jimmy,

Still think it could be mounts after my test?

Put the car in reverse, brake so the car remains stationary, and test acceleration. -No issues.
Put car in park/drive, remain stationary. -Rumbling.

So, I've had a Volvo C70 for about three months. 180k miles, transmission reportedly replaced with a used trans last year, just replaced the cat, and struts.

Now here's the deal. When in drive, the car becomes louder. I notice it immediately because I'm familiar with how quiet it was before. It's ...