Rolling rumble sound between 66 and 74 MPH

[JosephKing]

Greetings Fellow Diesel owners, I’m writing a post to get some feed back from all of you on an issue that just doesn’t seem to be going away. I Drive a 2005 -2500 4x4

I’m have a rumbling sound between 66 and 74 that is a rolling rumble sound. If I keep it below and above the given numbers, its fine.

To date I have replaced tires many times, balanced the drive shaft, checked muffler pipe mounts, changed front hubs to free wheel spin kits and replaced the transmission, and asked the tech how the mount looked. Every time through the years I have hopped what I changed removed the rumbling sound. The only thing I haven’t changed in the truck is the motor, rear end and motor mounts.

I would think if it’s the Rear end it would vibrate all the time. So, I’m thinking it could be motor mount.

Has anyone experienced this and can give me some InSite on how to make it stop?

 

[BigPapa]

What about the carrier bearing?

 

[JosephKing]

What about the carrier bearing?

I doesn't have the carrier Bearing, its a short bed Thanks for the reply

 

[BigPapa]

Well, then. I guess your problem’s not a carrier bearing.

 

[brucejohnson]

Without hearing it directly and making an assumption (Hee-Haw) defining "rolling rumble sound" I would throw my cent and a half and say a wheel bearing. If it increases in intensity with a hard left or right turn it may be in the front. The rear axle (my thought) or differential bearings could cause the rumble, too. I have experienced a "similar" rumble where the race and one or more roller bearings had pitted and where the two (bearing pits and race pits - or axle if bearing rides on it directly) matched up during their travels round-n-round they would rumble. It is weird that it would make loud noises at a certain speeds, barely noticeable at low speeds. Just a thought from an experience or two.

 

[JosephKing]

Without hearing it directly and making an assumption (Hee-Haw) defining "rolling rumble sound" I would throw my cent and a half and say a wheel bearing. If it increases in intensity with a hard left or right turn it may be in the front. The rear axle (my thought) or differential bearings could cause the rumble, too. I have experienced a "similar" rumble where the race and one or more roller bearings had pitted and where the two (bearing pits and race pits - or axle if bearing rides on it directly) matched up during their travels round-n-round they would rumble. It is weird that it would make loud noises at a certain speeds, barely noticeable at low speeds. Just a thought from an experience or two.

Thanks Bruce for your feed back.its sounding like my next option may be to look at that gear set and bearings in the rear end. The bearing in the front are not the cause,I’ve inspected and repacked.

 

[JosephKing]

has anyone ever experienced motor mount wearing Down and metal To metal causing a vibration while it’s under pressure from torque Maybe at that speed?

 

[BigPapa]

What about something like an inner fender? I had a loose inner fender on my Avalanche that would rattle/rumble if I got hit just right by a crosswind.

 

[brucejohnson]

has anyone ever experienced motor mount wearing Down and metal To metal causing a vibration while it’s under pressure from torque Maybe at that speed?

Only experience I had with that scenario was a loud clunk/squeak and gearshift (4 on the floor) displacement 8 inches from where I expected it (hand grabbing air), and air cleaner hitting hood in big block MoPar and small block Ford...but no vibrations.

 

[cerberusiam]

You will have to define what you are hearing better or record it. A "rolling rumble" brings to mind tires hitting rumble strips, not a good analogy to explain the problem.

Is it maybe an oscillating vibration you feel in the SOP meter and see in the mirrors? Is it more of a drone you hear rather than feel?

Have you removed the front drive shaft and driven it to see if that changes anything? Have you removed the rear driveshaft and driven it to see if that changes anything?

Have you changed tires? Moved them around looking for changes? How old are the tires, what make, size, and weight rating?

Have you changed the u-joints in the rear DS, not just manipulated them but CHANGED them to new units?

If you open your drivers door and run the rpms up to 1100 does the door vibrate and dance?

Based on my experiences with the same truck, if everything else checks out good the problem is the rear DS. The issue being that the rear flange is not true on the diff. If you flip the flange 180 degrees on the DS side does it change the vibes? If it changes the vibe you found the problem, if it doesn't change anything it is likely just the DS resonating to the torsional harmonics. Would advise you get a full length 5" DS from DriveLine Services and switch to the u-bolt yoke like the GM's use. These AAM flange drives are known for their inconsistencies plus the steel 1 piece DS's have a bad habit of resonating too much.

Chased the same problem thru everything plus new tires and finally cured the oscillating vibration with a custom DS and u-bolt yoke.

 

[Yo Hoot]

Some of these trucks had a driveline vibration at those speeds from new. I had it. I had the driveshaft balance and went to larger tires. Been gone since