Here, {TAIL ~ the third selection mechanism} 8 3 comprises a synchromesh mechanism having a shift gear 26, and is arranged to be operated to change over between the leftward second speed side and the rightward fifth speed side by {HEAD ~ means} of a third servo means 27 as shown in FIG 4 
Here , { TAIL ~ the third selection mechanism } 8 3 comprises a synchromesh mechanism having a shift gear 26 , and is arranged to be operated to change over between the leftward second speed side and the rightward fifth speed side by { HEAD ~ means } of a third servo means 27 as shown in FIG 4
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