Pictures of KRW Torque Tube center bearing tool.[IMG]
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Note the end the bearing goes on is solid with the shaft and has a square notch that a square rubber protrusion (which is in line with grease hole in the rubber) from the rubber the bearing is encased in locks the bearing so it cannot spin on the shaft.
At the transmission bell end note that the disk has an arrow to line up the tool with the grease fitting hole, I temporarily install a new grease fitting to more easily sight down and line up the tool. Also notice the groove in the shaft and the pin in the disk that prohibits the disk from turning on the shaft and prevents the shaft from turning relative to the disk. These things are what makes the tool so easy to use and accurate.