Just throwing this one in
Only vibration experienced was due to worn front axle pinion bearings.
This was caused by a partly seized UJ on drive shaft.
When took off, UJ only articulated one way and must have been going out for quite some time. Only started to get the vibration over 60MPH (96kph) after it probably eventually dried out.
Got an available 'cheapy' tack welded in 'mistake'
Couple of years later, when next taking the drive shaft off to get the 'Can' replaced on the other end as the rubber had perished over the years and spitting grease, found the UJ was seized one way again. So ordered a Spicer this time which they again tack welded in & rebalanced the shaft.
Checked for movement in pinion bearings which felt solid & OK 'Phew' as it wasn't cheap to get done and finding an axle guy to do it rare.
Going to have periodically unbolt shaft to check articulation for piece of mind.
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