The tranny funnels tranny gear lube through the tranny's rear output bearing into the tranny's tail housing and the Universal joint ball housing. The tranny gear lube, lubricates the u-joint and the rear yoke and propeller shaft bushings. The gear lube eventually levels out. There is a oil seal pressed into the front end of the torque tube, that prevents tranny gear lube from entering the rear axle housing.
The 1954 3100 rear yoke and propeller shaft bushings are also press fit into the front end of the torque tube. 1937 - and Early 1950 torque tube bushings were dowel pinned.
The Okie bushing sleeve is a quicker way to fix a bad torque tube oil seal and worn rear yoke and propeller shaft bushings.
The rear of the engine and tranny has a 3.70 degree pitch or tilt, which helps funnel gear lube into the tranny's tail housing and the Universal joint ball housing/torque tube area.
