Detachable differential for vehicle drive train

A drive train for a vehicle having a frame supported on forward and rearward wheels, a power means on said frame, and a drive shaft driven rotatably by said power means, said drive train comprising:

• a differential housing having an input shaft and two output shafts adapted to rotate in response to rotation of said input shaft,
• first coupling means on said input shaft for detachably coupling said input shaft to said drive shaft,
• a first and second connecting sprocket means on said output shafts of said differential housing,
• a third and fourth rotatable sprocket member each positioned adjacent one of said first and second connecting sprocket means, respectively, and which rotate about an axis approximately coincident with the rotational axes of said first and second sprocket means;
• said third and fourth sprocket members being approximately the same size as said first and second sprocket means, the outer peripheral edges of said first and second sprocket means being adjacent and in registered alignment with the outer peripheral edges of said third and fourth sprocket members, respectively,
• second and third coupling means each detachably coupling said first and second sprocket means to third and fourth sprocket members, respectively;
• said second and third coupling means each comprising a single chain trained over said registered pairs of first and third sprockets, and second and fourth sprockets;
• each said chain comprising a plurality of links joined into a continuous loop, one of said links being detachable to permit removal of said loop from said sprockets,
• a mechanism interconnecting each of said third and fourth sprocket members to one of said rearward wheels for causing rotation of said rearward wheels in response to rotation of said third and fourth sprocket members,
• said forward and rearward wheels being supported on axle means, said wheels and axle means bearing the weight of said vehicle,
• a securing means detachably securing said differential housing to said frame at a location above and remote from the location of said axle means for said rearward wheels.