Howdy,
How much play should be in the center support bearing? None like the u-joints? I have a '96 x-tra cab, longbed, 4x4 stock except for a leveling kit in front. I'm gettin' an intermitten vibration at various speeds, but mostly at highway speeds. Tires have recently been balanced and U-joints are tight, but there is "some" play in the CSB. Does this sound like a CSB on it way out? Thanks

 

You should have zero play in the center support bearing on the rear driveline.