Differential having steel hydraulic transfer bushing

A differential gear mechanism comprising:

• a differential casing defining first and second output shaft openings that are co-axially aligned along an axis of rotation of the differential casing, the differential casing having a case portion that defines fluid porting therein, the case housing portion including a hub extending therefrom, the hub having an inner hub portion that transitions to an outer hub portion at an annular face, the outer hub portion having a first outer diameter, the inner hub portion having a second outer diameter, wherein the second outer diameter is greater than the first outer diameter;
• a hydraulic transfer bushing received around the outer hub of the case housing portion, the hydraulic transfer bushing defining fluid communication porting therein wherein the hydraulic transfer bushing is disposed around the outer hub at a location where the fluid communication porting is fluidly connected to the fluid porting of the case housing portion;
• and
• a hydraulic slip seal disposed against the annular face between the outer hub portion and the hydraulic transfer bushing.

A differential gear mechanism comprising:

• a cast iron differential casing defining first and second output shaft openings that are co-axially aligned along an axis of rotation of the differential casing, the differential casing having a case portion that defines fluid porting therein, the case housing portion including a hub extending therefrom, the hub having an inner hub portion that transitions to an outer hub portion at an annular face, the outer hub portion having a first outer diameter, the inner hub portion having a second outer diameter, wherein the second outer diameter is greater than the first outer diameter, the outer hub portion defining at least one groove extending parallel to the axis of rotation;
• a steel hydraulic transfer bushing received around the outer hub portion of the case housing portion, the hydraulic transfer bushing defining fluid communication porting therein wherein the hydraulic transfer bushing is disposed around the outer hub portion at a location where the fluid communication porting is fluidly connected to the fluid porting of the case housing portion, the hydraulic transfer bushing having at least one inset portion that is received by the at least one groove on the outer hub portion, the at least one inset portion and the at least one groove cooperating to inhibit rotation of the hydraulic transfer bushing relative to the outer hub portion;
• a hydraulic slip seal disposed against the annular face between the outer hub portion and the hydraulic transfer bushing;
• and
• a snap ring nestingly received by a notch formed on the outer hub portion, the snap ring axially capturing the hydraulic transfer bushing on the hub.