I installed a Roger Brown 2" lift, and since then, I have been hearing a sound, similar to the sound of the fan hitting the shroud before it was removed . It is quieter, but happens when I start from a complete stop, until about 2000 rpm. Only in first gear. It's louder under load. If I accelerate really slowly, it doesn't do it, just with quicker starts from a complete stop. I haven't found anything that may be hitting the fan blades, but I'd like it to stop. Any help?