is you auxiliary controlled with the lever drive lever moving sideways? with my 743 I removed the hydraulic fitting on the plow and welded the hole then drilled out to a smaller size, this will restrict flow and slow it down, how small a hole would depend how slow you want it but Im assuming now its 1/4 to 3/8 so start small say 1/8 and try it, if you do this on the plow side any other attachment will not be affected and work normal