Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Yukon 3.75 gears for Ford 9 inch....noise
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Old 03-02-2011, 01:44 PM
AutoGear AutoGear is offline
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Assuming set up is correct, gear noise is usually attributed to the math - basically theres a remainder in the division. If the teeth don't mesh quite right, noise is generated.

One of our competitors makes a similar gearset to one of ours, but they use a different tooth count that is cheaper and easier to produce. These gearsets run 'loose' and make a lot of noise, but work fine. They lose strength because of the vibration and heat buildup (wasted motion), but they're fine for street applications.

Moral of the story: It comes down to comfort...if you can deal with the noise, keep em, if not, my suggestion would be to source an OEM stock replacement in the ratio of your choice.
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