As shown in FIGS 1A and 3, the front bearing support plate 10A includes a hollow cylindrical portion 10a which receives a rear end portion of the change shaft 5 such that {HEAD ~ annular fluid chambers 14a} and 15a communicating with clutch operating fluid passages 14 and 15 in the shaft 5 are defined in {TAIL ~ the hollow cylindrical portion 10a} 
As shown in FIGS 1A and 3 , the front bearing support plate 10A includes a hollow cylindrical portion 10a which receives a rear end portion of the change shaft 5 such that { HEAD ~ annular fluid chambers 14a } and 15a communicating with clutch operating fluid passages 14 and 15 in the shaft 5 are defined in { TAIL ~ the hollow cylindrical portion 10a }
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