I know intermittent problems are next to impossible to diagnose unless you're actually there when it's going on, but hopefully this may sound familiar to somebody out there! My 1990 Plymoth Grand Voyager (3.3 w/ 4 spd auto) has been making a screeching/whining kind of noise, sounds like it's coming from the front driver side...The best way to describe the noise would be if you've ever flicked the wheels on a toy car or a pulley really hard, and you get that screeching/buzzing/whining kind of noise.....Seems like when it does happen, it starts around 45, and when you slow down, it cuts out again around 20-25.....The noise seems independent of engine speed, if the noise starts and you floor it, the noise doesn't seem to change with revs. Seems like it happens more often when it's cold and damp out...not throwing any codes, no performance issues, just totally ANNOYING!! Finally got the sound to make itself known when my mechanic was in the car, and he said he didn't have the slightest....My thinking is: It can't be an axle shaft or hub, because the noise would be constant and vary with revs, right? Transmission or differential? But again, wouldn't that make the noise speed sensitive? I'm almost thinking maybe it has something to do with wind at speed, but yet again, if it were something like that, wouldn't it be an all the time thing?? ANY ideas or thoughts would be greatly appreciated, I'm really nearing the end of my rope and hate to trash the van, it's still like new inside, and I just repainted it last year!! Thanks in advance!!