[tdangle]

Originally Posted by Dead Parrot

Could be a case of the square body vibration mystery. There are multiple threads about a similar vibration at similar speeds. Most trucks don't have it. A few do. Those that have it generally resist attempts to fix. My 75 C10 does it sometimes although the speeds where it happens tend to be 65~75.

Things on mine that have been replaced over the years without fixing the vibration issue:
All u-joints, Center drive shaft bearing, rear axle bearings, engine, flex plate, rear drums, front rotors, rear spring bushings, several sets of tires. Also had the front end redone with many parts replaced.
Most of these parts were replaced because they needed replacing or I thought they did and not just to chase the vibration issue.

Sound like what I’ve been thru. Front end rebuilt disc brake upgrade in front new drums in back wheel bearings replaced I’m really at a loss as to what is causing this.
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