I put my Calmini suspension lift and steering kit on last week. Over night we got snow and freezing rain making sections of the road real fun. I put it in 4hi for some extra grip and at 35MPH I got a really bad vibration under acceleration. Pre lift this was never a problem. I had spaced the UCA's at half an inch to the bump stop. I changed the spacing tonight to 5/8 and the vibration is much less noticeable but still present. Should I worry about it, is it normal, just looking for a piece of mind.

You may have some ice or snow inside the wheels causing vibrations. Similar to when we get mud caked on the inside of the rims.