an additional speed change mechanism disposed within said front housing and behind said first intermediate wall so as to perform {HEAD ~ a first speed change transmission} between {TAIL ~ a primary shaft} and a first speed change shaft , 
an additional speed change mechanism disposed within said front housing and behind said first intermediate wall so as to perform { HEAD ~ a first speed change transmission } between { TAIL ~ a primary shaft } and a first speed change shaft ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH