It sounds like that one is totally worn out, to the point the seals can't keep up with the wobbly shafts. There will be either bushings or ball bearings on the output shaft, and probably sliding bushings on the control rod, with lip seals everywhere they pass through the case. Good bearings and bushings will keep the shafts steady enough for the seals to do their job.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
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