{HEAD ~ Gear} 61 meshes directly with gear 59, whereas gear 62 meshes with gear 60 via {TAIL ~ an idler gear} corresponding to 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 
{ HEAD ~ Gear } 61 meshes directly with gear 59 , whereas gear 62 meshes with gear 60 via { TAIL ~ an idler gear } corresponding to 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
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH