Rotatably mounted, in {TAIL ~ one side} of {HEAD ~ such housing} are rocker shafts 3 and 5, rocker shaft 3 being a 3rd and 4th gear ratio shaft and shaft 5 being a first and second gear ratio shaft 
Rotatably mounted , in { TAIL ~ one side } of { HEAD ~ such housing } are rocker shafts 3 and 5 , rocker shaft 3 being a 3rd and 4th gear ratio shaft and shaft 5 being a first and second gear ratio shaft
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD 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