Electronics shutdown and car shuddered

[sshu]

The car is a 05 4.4i with 75k miles. First the 4x4 light went on then all the car's electronics(radio, lights, etc) shutdown for about a second and then it flickered back on. As I was pulling over the car shuddered. It felt like a low pitch grinding noise for a couple seconds. The brake and abs light flashed a few times. I let the car rest for a couple seconds and restarted it. The 4x4 light was gone so I started driving but the electronics flickered again and 4x4 light went on again. The LCD also said, "4x4/DSC inactive". I continued to drive and there was no shuddering but the electronics shut-down again for a second. This has happened once every 4-5 days already and at least one of the issues I mentioned above if not all of them happen. All the issues happened soon after I put a new battery in the car. The battery is a Rayovac from Batteries +. I took it to my mechanic and he thinks that it could be the battery or alternator. Enclosed are the codes he pulled. What do you guys think? (sorry for the large sideways pics)