Said {TAIL ~ speed changing operation} of said either one transmission mechanism started in the step establishes a third shift position in {HEAD ~ the automatic transmission} 
Said { TAIL ~ speed changing operation } of said either one transmission mechanism started in the step establishes a third shift position in { HEAD ~ the automatic transmission }
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD