a second synchronizing device for selectively engaging {HEAD ~ the other low speed gear} and {TAIL ~ the other high speed gear} with said output shaft 
a second synchronizing device for selectively engaging { HEAD ~ the other low speed gear } and { TAIL ~ the other high speed gear } with said output shaft
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH