a first synchronizing device for selectively engaging a one of said low speed gears and one of said high speed gears with {TAIL ~ an output shaft} of {HEAD ~ said transmission} 
a first synchronizing device for selectively engaging a one of said low speed gears and one of said high speed gears with { TAIL ~ an output shaft } of { HEAD ~ said transmission }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD