Loud thud noise

While I was driving home from work I just driving about 30-35 mph and all of a sudden I hear and feel this loud thud noise from under my car. The noise and vibration felt like it right in the middle of my car, where the shifter is. I was only a few minutes from my house so I just kept driving. Pulled into my driveway and looking under the car and didn't notice anything. The car felt fine driving after I heard the noise. I don't think it was a rock or pothole. The noise felt like it was inside the car. What could it be? I'm a little worried. Thanks.

i think i am having the same problem. it came out of nowhere. i can almost feel the noise in my feet when my foot is on the pedals. any help is greatly appreciated

Hi all, first post, I have a 2003 Legacy L, Auto, 2.5 ltr 4 cly
While driving i hear a thud thud and car vibrates a bit, especially if i feather the gas. If i put in neutral and coast around 65 the noise appears to go away, i checked the trans axles both are good.
I just changed bearings, tie rods and ball joints thinking that was it but it wasnt, it needed that sutff anyway
also checked the drive shaft, no play or clicking.
Am i looking at a transmission issue or a torque converter issue or possibly if it has one a transfercase issue. is there a fuse that turns off all wheel drive switching/power

any help would be appreciated.