yawing steering motions of the front and rear axle assembles to provide efficient interrelated self steering actions of the end axles the center wheel and axle assembly is prevented from yawing relative to the frame by its connection therewith through the traction rods 42 however lateral motion is permitted by the traction rod connections within limits determined and in a manner to be subsequently described the traction rod connections are preferably made by means of rubber bushings spherical connections or other movable joints to permit relative vertical and lateral motion between the steering beam and its connected bearing housings the bearing housings preferably include means at both front and rear ends to provide for the connection of traction rods so that identical bearing housings can be utilized at any axle position of the railway truck it should be understood that the traction motors 30 are drivingly connected to their respective axles 22 23 24 by permanently engaged gears not shown which are maintained at a fixed center distance by the mounting of the forward sides 31 of the traction motors on their respective axles through conventional axle bearings not shown because of this mounting arrangement the traction motors 30 move with their respective wheel and axle assemblies during yawing motions resulting from self steering action of the front and rear axles according to the present invention this fact is taken advantage of to provide improved braking action for the truck this is accomplished in the manner best shown in fig3 and 4 by mounting on each of the traction motors elements of a brake system consisting of a brake shoe 43 an actuating lever 44 and a brake cylinder 46 for.