Xc90 strut brace mounts bolts stripped
 

I recently was driving home on a 2 hour drive and about 45 mins into the drive my xc90 started making a loud rattling noise coming from the front right hand side. A few weeks later on the same drive it started shaking a little bit and making the same rattling/shaking noise as I started to hit 30 mph accelerating from a stop sign, it shakes and makes a rattling/shaking noise between 25-40 mph now, but only after I've driven it for awhile. It's the worst at 35mph, so I had my fiancé check it out and the strut brace mounts bolt(s) are stripped. We are planning to replace them obviously, but until we do should we not use this vehicle??? It also shifts hard out of Park, I'm curious if the stripped bolts would cause all these issues? I'm assuming the whole mounts need replacing since the bolt or bolts are stripped? We just purchased it used a few months back and it only has 67,xxx miles so I was a little surprised this is an issue.

I'd check into whether one of the torque rods or motor mounts are bad. bolts can be replaced and a tap kit can repair stripped threads but I'd be wondering what caused all the extra stress to begin with.