Car sounds like a moving train?

[I-luv-em-all]

I have noticed this for a while know, but especially know that I removed all the back seats and spare tire etc.

If I am just driving straight at like 30% throttle or even off the throttle, still rolling though, I can feel a little vibration and it sounds like a train chugging along on the tracks. But if I turn in swerve in either direction the sound/vibration goes away instantly, but when i am back straight it comes back. Any ideas?

This is what I think it could be, Axles, driveshaft U joints, Low on T-case fluid, motor/tranny mounts??

I just installed my brand new Pirelli rubber, on good rims, balanced. I had a wheel alignment about 3 months ago. I have strut bars front and back. I have brand new shocks and struts and new springs but they aren't installed yet, do you think that may help?

Anyone that knows any more about this kind of stuff have any more ideas or thought on what it could be?

 

[Defiant]

Transfer case. Warranty.

 

[I-luv-em-all]

Ok I called the dealership, and the Vin number did not come up, now how do I find out if it has a recal on it?

 

[I-luv-em-all]

I missed a 1 in my VIN # so thats why nothing came up.

So I called the dealership again, and they said it is clean, no recalls outstanding.

Is it 100% the T-case? I am going to change the fluid first, what fluid do you use for the T-case?