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