A whining noise heard driving at freeway speeds (more than 55 mph) can be normal noise from the rear axle which is being transmitted through the body. A body/frame damper is available which may help with this concern.Google+
Car Problem Reports
Dodge Durango Whining Noise at Freeway Speeds May Come From Rear Axle
Dodge Durango Problem
Drive Trains Affected: 2WD, 4WD
Average Mileage: 145,764 mi (99,000 mi - 223,265 mi)
Visitor, 2005 Dodge Durango, 2WD, 147,000 mi
Similarly, my 2WD 2005 Durango has a whining noise about 60-70mph and when I let up on the gas pedal to coast the noise goes away, push down on the pedal can hear immediately.
Visitor, 1998 Dodge Durango
Does not matter how fast I am going I start to hear as soon as I take off from 0.
I hear a high pitch noise only after 60mph on the freeway and lets up after I take my foot off the gas. Whats the problem?
Visitor, 2003 Dodge Durango, 4WD, 223,265 mi
i have the same problem but mine doesnt sound like its near the back its around the middle so i thought it may be the transmission but im not sure and havent felt like doing anything about it yet haha it sounds like a jet plane taking off every time i enter the highway
Visitor, 2003 Dodge Durango, 4WD, 173,000 mi
whining noise as I speed up coming from rear end.
Visitor, 1999 Dodge Durango, 4WD, 128,085 mi
It grinds at low speeds when I turn an gets a vibration at 50mph an above
Visitor, 2002 Dodge Durango, 4WD, 123,000 mi
Loud whinning sound when moving at all speeds from the rear end. Dealership said it sounds like it was coming from the Differential