No, but many of my super duty buddies have... I only run the dynatracs. The keys is use a good grease and grease the things according to your application. Larger tires, dirty environment, wet environment, need more grease than a road queen truck.
One of my most loyal customers is a local off-road shop. The have basically eliminated ball joint, terra flex joint, and drive line issues switching to be our 3752. I almost feel dickish about talking about grease. But it just works... If you put it in there...
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