honda accord 1985 will shake if put into gear?

the honda accord will shake when put into gear and when i tried on drive it up on a ramp to work on it (or on a flat road) will shake the whole car. The honda has a Automatic trans. front wheel drive. would have to start it put it into N then shut down slam into R or D4 then start back up to get it to move but will shake fearlessly
what i have found out is there a ring that has cracked
 
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