I have seen aggressive tires alone shake the front end when it's on 4WD and I've seen worn tires do the same thing even though the amount of wear looked to be even and normal. But I'd still Road Force Balance them, I've not had a regular balance done on a truck or SUV since probably the late '90s...

 

If all else fails, try putting the truck on a lift, put in 4WD and try running. See if you see anthing out of balance, alignment or hear any strange noises. Just a thought. Good luck, I know the fustration of not being able to isolate a strange noice or vibration.

 

Well, since the loading is different on the ground as compared to a lift, I dont think you would be able to replicate the issue???

The movement within the axles....The rear doesn't "twist" because it's loaded when in park. The reason why the front "twists" a little is because there is no pressure being locked when in park unless your truck is parked in 4wd.
If you park on level ground, set your e-brake and put your transmission in nuetral, all axles will have similar "twist" play.
There should be zero side-side(lateral) movement of the axles or within the u-joints. If there is, you have bad u-joints. A perfect working u-joint will not move at all side-side and should never clunk even the slightest.
Your front cv shafts should be treated the same as your main driveshafts. They should not move side-side nor clunk or wiggle.
I suspect you have a bad ujoint somewhere up front.

 

You are correct, however my suggestion is if all else fails. With out the loading, loose or misaligned components may show an increased movement. Additionally, a problen drive shaft, loose bearing or out of balace wheel or disk will be visual. After 45years, I have seen a lot of strange cause and effect situations. Before today's CEL codes and electronics, it was a process of elimination. Back in the day, a cup of water was the best tool to set the carb, dark used to find bad wires and a hammer and pry bar for loose suspension components. Sorry, this old dog learns new tricks, but it takes me a little time.

 

Hmmm, I will look again under truck and take few pictures to show you where exactly I have movement in axles... For example on CV axles I have movement on inner side up-down, front-rear and even in-out (but this is on connection between CV yoint and front diff)... This is on passenger and driver side... Same thing is with front drive axle on the transfer case side... In the place where is rubber sealed joint, I can feel movement in all directions.

Oh, I will try and compare those movements to friends 2009 hemi 4x4. As I know, those components are very similar or even same? and his should be working ok.

Ujoints as I remember when I tested them with pry bar, there was zero movement.

I will take all of your suggestions and test them as soon as possible So we can make some conclusion on this issue