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Old 01-31-2019, 02:24 AM   #4
JFP in PA
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Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,277
There are two critical measurements: Pinion depth and back lash. Get either of these wrong and you will get anything from a howling gear set to a broken one. Side bearing preload is also important, but not as much as the other two.
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