I have this tiller that came with my 1970 MTD 960. I finally figured out that it has to be adjusted so that the input shaft of the tiller is parallel with the output shaft of the PTO when it is at tilling depth and to turn it off before lifting it. Otherwise it shakes really bad.
Still, I would trade it in a minute for a moldboard plow and a disk harrow. I just don't have much need for a tiller, gardening in Florida sand. I do, however, have need of a plow I can use to cut irrigation trenches.