A vehicle having a prime mover and a central gear box mounted to a frame. First and second transaxles are driven by the central gear box. Each transaxle includes an output axle having a completely splined external portion and a threaded end for engagement with a driven wheel, and the completely splined portion of each output axle is disposed in one of the driven wheels of the vehicle. A cross brace may be mounted to the two transaxle housings for rigidity.