Like others have mentioned they are either having issues with their drivers seat cushion being crooked or the seat shifts left to right making a clunking type noise. Mine is still under warranty and will take it in soon. But before taking it in I did my own investigation. It appears there is movement side to side in the front bar under the front of the seat. Looks like a 1/2" galvanized bar. When you grab the seat and push side to side you can see there's about an 1/8 in of slop from the brackets to the side of the seat frame. I took the cushion off thinking I might be able to torque the bolts a little more however, the brackets I believe are not designed to clamp the seat in place. I wouldn't waste your time taken the seat cushion off. It can be a little tricky to get back on if you don't know what your doing and I couldn't find a solution.
A quick fix, was to tie a piece of wire between the seat frame and the bracket around the bar. See picture. This is located directly below and under the front left corner of the seat as if you are sitting in it. I used speaker wire as it had a thicker coating and would absorb the movement. Movement is gone and cushion remains straight.
A quick fix, was to tie a piece of wire between the seat frame and the bracket around the bar. See picture. This is located directly below and under the front left corner of the seat as if you are sitting in it. I used speaker wire as it had a thicker coating and would absorb the movement. Movement is gone and cushion remains straight.