BFG KO 2 tires

[osprey ram]

I have 09 1500 4x4 bilsteins set at 2.1 frt. 285/70-17 bfg ko2 on stock aluminum wheels. Recent align, truck seems to wander back and forth at 45-50 mph. Has anyone dealt with similar problem ? Thanx for any input.

 

[doc 11 ACR]

I had a similar situation. It started with a wander then a vibration. Turned out to be an outside u-joint on the 4-wheel drive axle. Had the issue from the time I bought it used, three years ago. Had it in several shops including where I bought it.