HI, I just rec'd mine and had the same difficulty you describe so I just sat back analyzed what the cause could be and it was the coiled cable binding inside the upper shaft. I solved this by simply by sliding a short piece of 550 parachute cord thru the upper shaft and tying an overhand knot just under the spin nut on the end of the cable. I then just gently pulled the cable to free the binding and the shaft moved nicely. Once you see the plug end come thru just remove the parachute cord, connect to the head unit and finish your shaft installation. Good luck with the new detector!!!!