Dodge Truck

Any vibrations ? Could it be u-joints ?

Regards
Gemstone

Maybe rear end is going out. How many miles? Maybe aggressive tires. Some tires will really make a roar.

Could be wheel bearings or the differential. Easy way to see if it's wheel bearings is to jack up a tire, take a mechanic's stethascope and spin the tire. Put the stethascope on the metal as close to the tire/brakes as you can from the inside. If you hear grinding/crunching, your bearings are due for replacement. My wife's Subaru did the same exact thing and it was her bearings.

Is it louder when towing? Is the truck level when towing? Does thenoise decrease when you take your foot off of the accelerator?

No vibrations, truck is level and it only does it when we tow..it does not make the noise if we do not have the fifth wheel towing...

My 2012 GMC started doing this and it turned out it was the tread separating on the rear tires. The wonderful Good(for a)Year OEM tires that came on it with 30K miles. Not saying that is your problem but worth looking into. Also made my stabilitrak error light come on to.

Is it louder when towing? Is the truck level when towing? Does thenoise decrease when you take your foot off of the accelerator?

YES WATERBUG TO ALL OF THE ABOVE

Sounds like the middle ujoint from the rear driveline. I finally was able to isolate the problem using an infrared heat gun. The bad ujoint was 10deg warmer than the others. While on the truck everything was solid. When the rest driveline was removed the problem was obvious.

I had a roaring caused by tread separation on my Dodge dually. The tire caused the tire next to it to go flat. Naturally, I didn't have the key to the spare tire lock and had to take one of the good tires off of the left side and remove both bad tires and put the single tire on the right side and limp back to Vegas. Luckily, I only had an trailer with an ATV heading to Utah. Having the truck up on that screw jack on the side of I15 at rush hour was quite a thrill. Keys, don't leave home without them. General tires. I replaced them with Michelins.
Stan

I had a roaring sound on my 2005 Dodge Ram 1500 at speeds between above 60. Rather loud. Slower than 60 and the sound went away.

I do not remember the exact part that caused the issue but it was some plastic part on the drive shaft assembly that had broken. As the shaft rotated it caused this broken part to lift away from the shaft and strike part of the under carriage and cause the sound.

Shop replaced the drive shaft and sound was gone.