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In a hybrid vehicle that is capable both of performing running drive with gear-change being effected by an infinitely variable gear-change mechanism that performs gear-change of the output rotation of an engine that is capable of temporary stoppage control and also of performing running drive by mea

In a hybrid vehicle that is capable both of performing running drive with gear-change being effected by an infinitely variable gear-change mechanism that performs gear-change of the output rotation of an engine that is capable of temporary stoppage control and also of performing running drive by means of a second motor generator, when running using the second motor generator with the engine temporarily stopped, a forward/reverse changeover mechanism is released by a forward/reverse clutch control valve. If this forward/reverse clutch control valve becomes inoperable due to its spool sticking, etc., a gear shift inhibitor valve is operated by a gear shift control valve to supply line pressure to the forward/reverse changeover mechanism through a port of the forward/reverse clutch control valve in this sticking condition, so that this can thereby be engaged.

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In a hybrid vehicle that is capable both of performing running drive with gear-change being effected by an infinitely variable gear-change mechanism that performs gear-change of the output rotation of an engine that is capable of temporary stoppage control and also of performing running drive by mea

In a hybrid vehicle that is capable both of performing running drive with gear-change being effected by an infinitely variable gear-change mechanism that performs gear-change of the output rotation of an engine that is capable of temporary stoppage control and also of performing running drive by means of a second motor generator, when running using the second motor generator with the engine temporarily stopped, a forward/reverse changeover mechanism is released by a forward/reverse clutch control valve. If this forward/reverse clutch control valve becomes inoperable due to its spool sticking, etc., a gear shift inhibitor valve is operated by a gear shift control valve to supply line pressure to the forward/reverse changeover mechanism through a port of the forward/reverse clutch control valve in this sticking condition, so that this can thereby be engaged. ed member and said collar. 3. A differential axle assembly disposed within a housing, said assembly comprising: a differential case driven by an input shaft and adapted to allow differential rotational speed between a pair of output shafts; a gear assembly disposed within said differential case to facilitate said differential rotation between said output shafts, said gear assembly including a pair of side gears each secured to a corresponding one of said output shafts; a clutch device disposed between said differential case and one of said side gears for selectively coupling said one of said side gears shafts to said differential case and thereby the other output shaft; and a planetary gear assembly disposed between said one of said side gears and said clutch device, wherein said clutch device is disposed external said differential case and within an extension of said housing. 4. The limited slip differential assembly according to claim 2, wherein said clutch device includes a plurality of clutch plates alternatively splined on said cup-shaped member and said extension of said differential case to facilitate selectively coupling therebetween. 5. The limited slip differential assembly according to claim 2, wherein said extension is cone-shaped, and includes strengthening ribs along an external length thereof. 6. The differential axle assembly according to claim 3, wherein said planetary gear assembly comprises a collar rotatably mounted about said differential case; a first planetary gear set rotatably mounted to and extending through said differential case to engagably connect said one of said side gears to said collar; a cup-shaped member rotatably disposed about an extension of said differential case; and a second planetary gear set disposed between said cupshaped member and said collar.