[Elite1]

Once about 3 years ago I had a loud humming noise come from some where in the engine area, seemed like near the firewall but not sure, it lasted about 10 seconds then stopped, while I was at an intersection. Last week I got off the freeway and pulled up to a stop light and heard the exact same loud humming noise, it lasted about 5 seconds then went away....it almost sounds like a howling, almost like a radiator overheating....but the truck isn't hot, has good oil pressure etc.....Now today it did it again as I slowed down turning into a farm off a highway, it made the same loud sound, and lasted about 20 seconds. Unfortuanatley the sound goes away before I can get under the hood for a better look. All fluids and gauges check out OK. Any ideas what this could be?