On my 97 Transport, I have recently had some noise (somewhat loud hum?) coming while driving straight and while turning towards left. The noise disappears when turning towards right. There is no noise at idle, and with brakes pressed and gas given, there is no noise. This leads me to believe it is steering related. The noise gradually increases with speed.
I got under the van to take a look. The CV boots are fine. There is no play when moving the tire from top and bottom. There seems to be little play moving tire from left to right, but that is normal, right? The ball joint seemed to be strong.
The steering boot looked OK, but there is snow on the ground so it is hard to tell.
Any thoughts? I don't have much experience troubleshooting steering/suspension issues.