Son's van. They drove it 60 or 7 miles yesterday, acting normal. This morning they started it up and it was making some high pitched whine. He tried to drive it. No response in any gear. He checked the fluid and it was fine. I went in after lunch and had him start it up. A little whine, but I have heard worse. I asked him if he checked the fluid while it was running. He said no. I checked it while running. It was above the full mark. I doubt if it has been checked in the year they have owned it. I checked it several more times to be sure. I then had him move the shifter thru the gears to see if it was operating correctly. All parts were in place and moving. I ran out of ideas so I talked to my mechanically inclined son, and he didn't have any other ideas. The son who it belongs to was on the net researching the issue. With the symptoms, he thought it might be the torque converter or a pump. Any ideas on this or what to check next? Thanks, Roy