Isolating low speed knocking noise after Icon Stage 2 Install

Sorry about another "noise after lift install" post. I had an Icon stage 2 kit installed and have them currently set at 1.5" thread showing on the front. The truck has almost 2k miles on it and just got an alignment. The first few days of driving it I would hear a slight knock at low speeds and fast forward a week and the sound is almost every 2-3 seconds. It makes the noise on all terrains I've driven on and happens with the wheel straight from 0-15mph (can't tell if it keeps up because of road noise from then on). So otherwise if I'm on a level surface and leave the wheel straight and slightly accelerate it will keep knocking. Any advise would be appreciated.