A transmission housing (2) including two housing elements (9) that can be positioned to press against each other and that in the assembled state define: a cavity (13)； a shaft (6) projecting at least in part from the housing； a motion transmission mechanism (30) for transmitting motion to said shaft (6), the motion transmission mechanism (30) being housed at least in part inside the cavity (13) of the housing (2)； and adhesive connection means (16) for connecting together housing elements (9) that are arranged in the zone where said housing elements (9) are pressed together and referred to as a join plane (10).The adhesive connection means (16) include a main channel (163) for receiving adhesive surrounding said cavity (13), said main channel (163) comprising a female element (1631) carried by a housing element (9) and a male element (1632) carried by the other housing element (9) with the male element (1632) being engaged at least in part in the female element (1631) in the assembled-together state of said housing elements (9).
