Not sure about being made in the USA but I would go with Yukon and get the Y.E.S. warranty. It basically covers absolutely anything that could go wrong. Which includes anything from installer mis-installation to downright abuse and whatever else you can throw at it. It's $45 a piece for gear set and it is well worth the Peace of Mind. When I bought gears from my Ram I went with When I bought gears from my Ram I went with 4:56 gears and bought the warranty and I'll be damned if I didn't have to replace the rear set due to some unforeseen issue that I'm still not sure of. Because it was my daily driver they shipped the gears out immediately without having me send them the gears back first. And the best part is the gears I replaced are guaranteed just like when I bought the warranty originally. Once you buy the warranty for the gears they are covered for the life of the vehicle no matter how many times you have to replace them for as long as you own the vehicle. Well worth the peace of mind in my opinion and excellent gears.
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