helical preload spring 16 and the aperture 44 defined in the second projection 32 of accessory 6 operably engaging a threaded aperture 33 provided in the torque coverter housing 10 the accessory 6 would thereby pivot upon the second bolt 20 positioning the secondary drive wheel 34 in direct rolling contact with the primary drive wheel 8 shown in fig2 with the contact pressure between the primary drive wheel 8 and the secondary drive wheel 34 being adjustable by turning the first threaded bolt 18 which is threaded into the threaded aperture 33 of the torque converter housing the rolling contact pressure is maintained by the spring force f the helical spring 16 upon the second projection 32 of accessory 6 the force of the helical spring 16 upon the second projection 32 of accessory 6 also compensates for any wearing of either the primary drive wheel 8 or the secondary drive wheel 34 the helical spring 16 could be any biasing means known in the art fig2 shows the primary drive wheel 8 secured to and projecting from the outer shell 28 of the engine driven torque converter co axial with the projecting hub 30 of the torque converter with the secondary drive wheel 34 in contact with the primary drive wheel 8 of the accessory 6 fig3 shows the secondary drive wheel 34 being connected to the accessory 6 by use of a keeper member 22 which would.