Hello all. I just purchased a 99 Dodge Grand Caravan AWD with 79K, from the original owner. The car has been well maintained with all receipts, except for probably the most important maintenance, the transmission. I had originally thought the transmission had been flushed at 46K because there was a BG sticker under the hood. After reviewing the receipts I determined it was a BG brake line flush during some brake work. Anyway I have noticed that at between 45-55 MPH when I am applying the accelerator (even lightly) that there is a washboard like sound and vibration. It almost seems to come from the back of the vehicle but definitely sounds like the drive train. If I let off the gas the sounds disappears. The sound/vibration also seems to appear during low speed acceleration when I am turning the vehicle (though it is not nearly as pronounced). If I drive in 3 instead of D (3rd and 4th) the sound does not appear when doing 45-55. I am leaning towards the transmission, but wonder if it could be the all wheel drive system. I have purchased a new Chrysler filter, 10 quarts of ATF+3, and plan on dropping the pan this evening. I will then disconnect the cooler line from the trans and try to flush out as much of the old fluid as possible. Anyway, does this sound like a transmission problem? The car does not slip and shifts pretty smoothly.
Thanks,
Lonnie