Cap with clutch for helical LSD

1. A cap for use with a casing of a helical limited slip differential (LSD) rotatable about an axis to lock up differential motion, comprising:

a clutch member combinable with sun gears of the helical LSD, and including clutch teeth;

a clutch ring including a ring portion including clutch teeth so as to mesh with the clutch member and one or more tab portions being unitary with and projecting radially outward from the ring portion;

a cap main body fixed on an axial end of the casing, the cap main body having a first face in contact with the casing and a second face axially opposed to the first face;

a receding portion of the cap main body receding from the first face toward the second face and being so dimensioned as to receive and allow the clutch ring to be axially movable, the receding portion including one or more dock portions respectively receiving the tab portions;

an opening opened on the second face and in spatial communication with any of the dock portions to allow access to the tab portions;

side faces of the tab portions, each of the side faces inclining toward the second face;

inner faces of the dock portions inclining toward the first face so as to butt against the side faces in a circumferential direction to axially press the clutch ring toward the clutch member; and

one or more base portions each having a shape capable of having axially close contact with the casing in continuity between adjacent dock portions.

2. The cap of claim 1 , wherein the base portions are so disposed as to axially align with short pinions of the helical LSD and each of the base portions comprises one or more bolt holes axially penetrating the base portion from the first face toward the second face.

3. The cap of claim 1 , wherein the side faces are longer in axial length than the inner faces.

4. The cap of claim 1 , wherein the clutch member is axially elongated to come in contact with the cap main body.