such universal joints makes up a substantial part of the cost of a propeller shaft construction thus the portion of the front drive system which is made up from and comprises the front propeller shaft 24 the flange joint 23 and the spline joint construction 25 and the sleeve shaft 26 is located so as to have a very slim portion thereof to wit the spline joint construction 25 adjacent to and beside said connection portion 38 between the body of the internal combustion engine 1 and the casing of the automatic speed change device 2 and similarly the support construction for said front drive system including the bearing 35 which inevitably is a fattened portion of said front drive system is arranged to be axially located not beside said connection portion 38 which would undesirably displace the front drive system to the side again but beside a more rearward and narrower portion of the speed change device housing 6 so as not to cause any problem with regard to angling of the front wheel propeller shaft 24 also by the shown construction the front differential device 40 can be positioned close to the side wall of the internal combustion engine 1 or of its oil pan 39 and the rigidity of support provided for this front drive system including the front differential device 40 can be maximized the central differential device 10 is a drive torque non balanced distribution type and as specified above the ring gear 14 thereof is connected so as to supply rotational power to the rear wheel drive system while the sun gear 13 thereof is connected.