Facts:
2006 Dodge Ram Quad-Cab Laramie 4x4
161,000 Miles
Regular oil changes
Regular rotation and balancing

Symptoms:
Vibration occurs at 48-60mph. Starts at approx. 48mph no matter how aggressive the acceleration, and continues until it seems to smooth out at approx. 60mph.
If coasting down from any speed greater than and equal to 60mph, the vibration shake the truck, from the steering wheel, the peddles and was told passengers can also feel it so it's not just me personally attached to the vehicle via the steering wheel or peddles.
The vibration also occurs even if shifted into neutral between 48-60, or coasting down in neutral from a speed greater than or equal to 60mph.
The vibration shakes the two house keys like an earthquake when its happening.
No other signs of wear, tear, or deterioration of hardware.

Attempted solutions:
Rebalance of all tires
Rotation of all tires
Inspection of U-joints
New CV axle installed on front passenger side (mechanic said crankshaft output rod was the issue, however other professional opinions did not agree)

 

Did rotating the tires change anything at all? Sure sounds like something is out of balance.

 

Check U-joints again. The slop can hide very easily.

 

Dry/stiff joints can cause trouble as well.

 

Might want to check the rotors, and calipers... maybe something in those areas could be contributing to the issue, like warped rotors...

 

Not unless you’re applying the brakes. And if they WERE warped enough to be felt without braking, as soon as you stepped on the brake pedal, your teeth would pop out of your mouth!!

 

Let's just say I hope to never have that happen to me...

 

ALL very good questions!

Rotating the tires showed no improvement or worsening of the issue.
Brand new pads and rotors were installed a short time prior to the beginning of this vibration.
And to clarify again, this vibration occurs at acceleration, as well as deceleration. No use of the brakes causes this shutter to start or stop.

My brother and I have began comparing the sound/shake to the landing of an airplane when the pilot puts the flaps down just prior to hitting the ground.

 

I'll have another set of eyes check the U-joints. There's apparently more than one from what the first mechanic told me.

 

It'd probably be best if you had them check everything in the area of the U-Joint as well. For all you know it could something that's hard to see