Both sets are stationary with {HEAD ~ respect} to {TAIL ~ a transmission housing}, i.e. there is no sliding motion of any gear 
to
Both sets are stationary with { HEAD ~ respect } to { TAIL ~ a transmission housing } , i.e. there is no sliding motion of any gear
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH