Transmission housing arrangement

A transmission housing arrangement for accommodating a plurality of meshing gears comprising:

• a main housing accommodating at least one of said plurality of meshing gears;
• an extension housing connected to said main housing and accommodating the remainder of said plurality of meshing gears;
• an intermediate plate partitioning said extension housing and said main housing, said intermediate plate having a vertical plane and defining a through hole at a lower portion thereof, said through hole establishing fluid communication between said extension housing and said main housing;
• a bottom wall defined by said extension housing, said bottom wall defining a recess having a first surface and a second surface, said first surface being elevated with respect to said second surface, a first end of said first surface being connected to a first end of said second surface, a second end of said first surface and a second end of said second surface facing said intermediate plate, said through hole and said recess defining an oil passage;
• a substantially vertical plane through said second end of said first surface and said second end of said second surface being closer to the vertical plane of said intermediate plate than any vertical plane through said remainder of said plurality of meshing gears;
• whereby said first surface restricts fluid flow to the vicinity of said remainder of said plurality of meshing gears, thereby minimizing sweeping up of lubricant from said remainder of said plurality of meshing gears.