Used to be everything Moog sold was Premium, and if said Moog on the box you knew it was good stuff. Nowadays (and for a while now) Moog has an 'economy' line of parts, and a Premium grade. I think they even have a middle grade too on some things. Kind of a good/better/best market approach. So the problem is a guy needs to spend a few moments to make sure you know what yer ordering.
The problem is, how's a customer supposed to know from a detailed standpoint, what the
REAL differences are between a lower grade part and a more expensive part? Hardness of the metal? What's the longevity difference? Is is 20% less life? 50%?? Well there's no way for a customer to really know. That's what sucks about buying Moog nowadays -- it's confusing. When I do buy their stuff, I generally buy their Premium grade products. And those parts have been great quality. FWIW, AC/Delco has followed the same market approach with their 'Genuine', 'Gold' & 'Silver' lines of parts (also somewhat confusing on what the quality differences are as they don't really tell ya). In my experience AC/Delco's Genuine (original) line is very good ...like, OEM.
IDK if Mopar has gone that way yet. I haven't seen it. I just buy Mopar replacement parts and haven't been disappointed.
This Mevotech TXMS25563 upper ball joint is listed as "Premium" with Rockauto and is greasable. I haven't tried them ...but you might take a chance on it ..and keep them greased..
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