Had a knocking sound coming from the rear of my 2005 MR for a while. Car drives completely fine, but I feel like it’s gotten a little louder recently. The sound is speed related as it gets louder and knocks faster the faster I go. I can hear it over my exhaust pretty noticeably. Not really sure what’s causing it or what to look for. Any help would be appreciated.

 

If its speed related, start checking stuff that spins. Axles, driveshaft, u-joint(my personal guess), etc.

 

could be an LCD bolt backing out. check it asap

 

Took a quick look under the car and I couldn’t find any loose bolts other than 2 under the rear subframe. Tightened then and still hear the knocking sound. All the bolts on the rear diff are snug