It is also desirable in {TAIL ~ many systems} to maintain a difference in fluid pressure levels between the fluid in different selected clutches, such as {HEAD ~ speed range} and directional clutches, during initial engagement 
It is also desirable in { TAIL ~ many systems } to maintain a difference in fluid pressure levels between the fluid in different selected clutches , such as { HEAD ~ speed range } and directional clutches , during initial engagement
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH