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Re: Planning to upgrade the 12 bolt rear end in my 1970
It's been several years since I bought from them, but Randy's pre- and post-sales support was excellent. And their YG-series gears are very quiet, but not the cheapest. I suspect their ZG-series would be just fine for a truck.
Here is the difference:
USA Standard gears are made by Yukon - same materials, process, plant, drawings, etc. When the Yukon gears are brought in house, they go through quality control. If the contact portion of the ring and pinion don't meet tolerances for a quiet gear (too rough), then the gear is downgraded to USA Standard (ZG) rather than tossing it in the trash. It's still a great gear strength wise and etc, but in some instances they can be noisy. I have several customers of mine that all they buy is USA Standard gears and I've yet to hear of any actually being noisy.
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Mike
1969 C10 LWB -- owned for 34 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes.
1982 C10 SWB -- sold
1981 C10 Silverado LWB -- sold, but wish I still had it!
1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming.
Retired as a factory automation products salesman.
Worked part-time over the years for an engine builder and a classic car repair shop.
Member here for 23 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!
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