I inherited this machine and I would have preferred something other than an MTD product but "the price was right". The 4way chute control works fine for upper chute positioning but the lower chute won't rotate. I've removed the chute control box and it works fine but when placed on the lower chute it won't rotate it. The female connection on the lower chute is just circular while the male end of the chute control box is flat on its sides. I suspect there may have been plastic fins on the chute that have broken off. Why? the owners manual says to apply "an even coat" of lithium grease to the lip of the chute base which I have done (after cleaning the old grease off) but the chute is very difficult to rotate by hand especially in the cold. I suspect that may be why the female end on the lower chute is missing something. Has anyone else run into this issue and does it sound like i'm on the right track and need to replace the lower chute? What should I lube the chute base and lower chute with if I'm correct about the cause of the problem?