I just had gears installed by a shop in Bellingham, Driveline Service. They like Nitro the best. He said that they are made in Italy, using some of the original Dana moulds. They're not so fond of Yukon. He said one of the stampers must be dyslexic as the stated clearances are usually off. I have Nitro in the front, Yukon in the back, and the latter are a little noisier I think. Just looking at the two before they were installed, I thought that the Nitro gears looked like they were machined better. Nitro is cheaper too:laugh3: