Lubricating structure for output shaft bearing portion in transmission

A lubricating structure for an output shaft bearing portion in a transmission, comprising:

• an extension housing which is attached to an axial outside of an end wall portion of a casing main body of a transmission casing;
• an output shaft bearing portion provided in said extension housing for rotatably supporting an output shaft which protrudes through said end wall portion;
• a gear wheel which is contained inside said extension housing and which is coupled to said output shaft,
• wherein said end wall portion has formed therein a lubrication oil passage which supplies a lubricating portion with lubrication oil in said casing main body, and an oil guide passage for guiding the lubrication oil supplied to the lubricating portion inside said casing main body from said casing main body directly into said extension housing without returning the lubrication oil to an oil pan, and
• wherein said extension housing has formed therein a rib for guiding the lubrication oil flowing from said oil guide passage into a position in which the lubrication oil can be scraped by said gear wheel so that said output shaft bearing portion is lubricated by the lubrication oil scraped by said gear wheel.