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Ring And Pinion

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Ring-gear diameter is one measure of strength, so is ring-gear thickness, and the size of the teeth in the gear. Again, as a general rule, the thinner the ring, or the thinner the teeth, the weaker the gear. These three ring-and-pinion sets-(from L to R) Dana 44, Ford 8.8-inch, and Ford 9-inch-are all about the same diameter. But notice how much stouter the Ford gears are compared with the 44.

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