A vehicular differential device includes a differential case, a ring gear, and a welded portion positioned on an abutting surface where the differential case and the ring gear are in contact with each other. The welded portion is configured to join the differential case and the ring gear for integral rotation of the differential case and the ring gear around a rotation axis of the vehicular differential device. The welded portion includes a plurality of welding surfaces positioned at predetermined intervals along a circumferential direction around the rotation axis.

A vehicular differential device includes a differential case, a ring gear, and a welded portion positioned on an abutting surface where the differential case and the ring gear are in contact with each other. The welded portion is configured to join the differential case and the ring gear for integral rotation of the differential case and the ring gear around a rotation axis of the vehicular differential device. The welded portion includes a plurality of welding surfaces positioned at predetermined intervals along a circumferential direction around the rotation axis.

A manufacturing method for a power transmission mechanism including: first and second shafts having first and second double helical gears; first and second rolling bearings rotatably supporting the shafts with respect to a case and restrict movement of the shafts in an axial direction thereof, includes an assembling step of assembling an outer ring of the first rolling bearing and an outer ring of the second rolling bearing to the case in a state where the outer rings are movable in the respective axial directions; and a positioning step of determining axial positions of the first rolling bearing and the second rolling bearing while rotating the first shaft and the second shaft in a state where the first double helical gear and the second double helical gear are meshed with each other, after the assembling step.

An axle assembly having a differential assembly that may include a gear reduction unit, a differential nest, and a coupling. The differential nest may be at least partially received in an inner housing. The inner housing may be rotatable about an axis with respect to an outer housing when the coupling is in a first position. The inner housing may be rotatable about the axis with the outer housing when the coupling is in a second position.

An axle assembly having a differential assembly that may include a gear reduction unit, a differential nest, and a coupling. The differential nest may be at least partially received in an inner housing. The inner housing may be rotatable about an axis with respect to an outer housing when the coupling is in a first position. The inner housing may be rotatable about the axis with the outer housing when the coupling is in a second position.

System for securing a part in a vehicle differential housing may have a differential housing having an interior wall and an exterior wall. The interior wall defines a cavity within the housing. The system may also have an axially inwardly extending feature integrally formed, unitary and one piece with the differential housing interior wall. The feature may define a first arm extending parallel a portion of the interior wall adjacent where the feature is connected to the interior wall. The feature may define a second arm extending transverse the first arm and a third arm extending transverse the second arm. A non-magnetic material may cover an end portion of the third arm.

A differential assembly includes a first case rotatable about an axis and defining a first mounting flange having a through hole and a second case abutting the first case to define a gear nest cavity therebetween. The second case further defines a second mounting flange having a through hole and formed to mate to the first mounting flange. The differential assembly also includes a ring gear mounted to the first mounting flange and fastener extending through the through hole of both the first mounting flange and second mounting flange into a fastener hole of the ring gear. Additionally, the first mounting flange is sandwiched between the second mounting flange and the ring gear.

A differential assembly includes a first case rotatable about an axis and defining a first mounting flange having a through hole and a second case abutting the first case to define a gear nest cavity therebetween. The second case further defines a second mounting flange having a through hole and formed to mate to the first mounting flange. The differential assembly also includes a ring gear mounted to the first mounting flange and fastener extending through the through hole of both the first mounting flange and second mounting flange into a fastener hole of the ring gear. Additionally, the first mounting flange is sandwiched between the second mounting flange and the ring gear.

A high-ratio differential reducer is provided. A carrier is connected to an input shaft. At least one planetary gear is supported to be rotatably supported by the carrier in an eccentric state from the carrier. A fixed annular gear meshes with the planetary gear in a state of being coaxially arranged with the carrier. A rotating annular gear meshes with the planetary gear in a state of being coaxially arranged with the fixed annular gear and has the number of teeth set by Equation below:
Z.sub.o=Z.sub.f±N.sub.p  (1),
where Z.sub.o is the number of teeth of the rotating annular gear, Z.sub.f is the number of teeth of the fixed annular gear, and N.sub.p is the number of planetary gears.

An electro-mechanical transmission shifter preferably includes a first actuator, a second actuator, a shift linkage device, actuator mounting bracket, a programmable controller and a gear shift remote. The shift linkage device includes a mounting base plate, a first transmission shifting bracket, a second transmission shifting bracket and a linkage rod. The linkage rod couples the first and second transmission shifting brackets. The actuation rods of the first and second actuators are pivotally connected to the first and second transmission shifting brackets, respectively. A mounting end of the first and second actuators are retained on the actuator mounting bracket with first and second clevis blocks. The programmable controller receives a signal from a gear selector remote to change a gear in a transmission. The programmable controller also monitors the electrical current sent to the first and second actuators.