vibration....pulsing shutter - ZF problem?

blakeMTN KAT

I have a pulsing vibration...about every 2 seconds, felt at 60-70MPH. I notice it most in the upper frame of the driver's door. Wheels are balanced, steering is fine(no shake) & shafts seem fine(universals and bolts are tight). Not sure if the ring gear is safety wired....this is my worry. Could it be an indication that the bolts are loosening? Can I verify the bolts with a micro cam through the ZF drain or fill plugs? Thanks.

11/4/085:28 PM

Original Post

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