Gear 61 meshes directly with gear 59, whereas gear 62 meshes with gear 60 via {HEAD ~ an idler gear} corresponding to {TAIL ~ the idler gear} 63 shown in FIG 1A. As shown in FIG 6, a double acting synchronizer clutch assembly 114 is mounted on the change shaft 5 for coupling gears 61 and 62 selectively to the shaft 5 
Gear 61 meshes directly with gear 59 , whereas gear 62 meshes with gear 60 via { HEAD ~ an idler gear } corresponding to { TAIL ~ the idler gear } 63 shown in FIG 1A. As shown in FIG 6 , a double acting synchronizer clutch assembly 114 is mounted on the change shaft 5 for coupling gears 61 and 62 selectively to the shaft 5
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