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It's possible that a driveshaft assembled at the factory wouldn't need weights, but unlikely. Because they expect the assembly to be balanced, each of the individual subcomponents is not really manufactured to be overly well balanced. For example, they might use tubing with a weld seam down...

While a dynamic balancer will balance better, and allow the driveshaft to survive some things a static balance weight wouldn't, keep in mind that the balancer itself probably has lower survivability. Anything that would wreck a static weight is definitely going to destroy the dynamic balancer...

They are not apples-to-oranges, a rotating mass is a rotating mass, and you balance them the exact same way. You did say they didn't work, you called them "snake oil" which is exactly what that means. Your argument then is that nothing should ever be balanced to any extent because it's a...

I'm not sure where this skepticism is coming from. Dynamic balancers work really well - better than static balancing (within the range of imbalance the model can handle). They're significantly more expensive though, so if regular balancing weights will do (e.g. you don't need the dynamic...

There are vibrations that can be felt, as well as unusual people like yourself perhaps that have driven a zillion miles and can feel everything. I'm not as experienced as you, but no newbie to mechanics and vibrations either, and I COULD NOT TELL even when paying attention for it. Whether you...

I disagree with a lot said here. 1.) My Spicer u-joints did come with the tab washers. Clearly some don't, but if some do, Spicer must not think they are a bad idea. The part number for them separately is Spicer 98-741 ("lockstrap"). 2.) Loctite does work pretty well, but tab washers...