Hellow, I have a 1969 Merc. 160 GMC. I am trying to replace the steering cable. On the transom, I have loosend the retainer couplings on the aluminum tube. This being an old cable, dose the aluminum tube slide out? It looks like the tube and cable are one unit. I can not get it to move! The aluminum tube is inside two round holes that is conected to the transom plate. I am not sure how to get the cable out?? Any help would be Great! Thanks