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