Sounds like the trans in there might have been a boneyard unit.
We just had the torque converter replaced in our 05 4.7L Durango at work. Odometer is around 60k.
Did you pull the pan and make sure that the sump filter did not come loose from its mount?
Keep us posted, and let us know how things turn out.
2004 Durango SLT AWD 5.7 Hemi Flame Red with 3.55's (Mine)
05 Dodge Grand Caravan SXT 3.8L Linen Gold Pearl (Hers)