Low Rumble on 97 caravan

[mowerseller]

I have a 97 Dodge Grand Caravan with the 3.8 and 16" wheels.
Several months back I could faintly here this sound when driving at 60 or more, when you swerved 1 way or the other it would go away, transmission shop hooked on the computer and things checked OK, he said front wheel bearings are beginning to go out. Several weeks later the sound got worse, so I replaced the front bearings myself. The right bearing rattled when you shook it and the left bearing had some play. I figured this was it, but no the problem is still there. A friend of mine who has a shop said it would be the drive shafts, he replaced both and the problem is still there. He gave up, and told me to take it to a trans. shop.
Keep in mind it sounds like it comes from the front and only when driving straight, when you corner the sound goes away. Sounds like the distant rumble of a helicopter.
It has low miles on the tires and the tires were rotated.

[gas28man]

From what you describe, it sounds possibly like a bad brake caliper. I've seen it where if the caliper is bad, the pads won't retract properly when you let off the brake pedal, so they rub hard against the disc. Swerving one way or the other backs them off just enough to make the noise stop. After you swerve to cure it, does getting on the brakes bring the noise back?

Sometimes just bleeding the front brakes will flush out whatever contaminant is causing the caliper to hang up. Yours sounds pretty bad, though, so I bet you need to replace the caliper (if, in fact, that is the problem).

Good luck, and let us know what you find.

Rick