this model introduced the type s straight-4 water-cooled engine, conventionally mounted in the front of the car and driving through the rear wheels. two small grills at the front allowed air for the engine's radiator. transmission was by a 3-speed manual gearbox and a hotchkiss drive (previous toyotas used a torque tube) to a rear-mounted differential. the final drive gear ratio was 7.17:1 .