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post #1 of 7 Old 09-18-2020, 09:14 AM Thread Starter
PLM
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Pinion Markings

I don't understand this marking. Usually a plus or minus amount for setting depth, but what is this? This is a new Dana Spicer pinion for a D 30. I am new at doing diff setup so excuse my ignorance.

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post #2 of 7 Old 09-18-2020, 10:49 AM Thread Starter
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Nobody knows?
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post #3 of 7 Old 09-18-2020, 11:49 AM
Fourtrail
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Those look like batch marking, one of those should also be on the ring gear. Dana factory gears don't have a +/- marking on them, only the mark to match to it's ring and the 2nd is a depth code that is only known to Dana.

80 CJ-5, 74 CJ-6, 56 CJ-5
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post #4 of 7 Old 09-18-2020, 01:15 PM Thread Starter
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Okay, Thanks
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post #5 of 7 Old 09-21-2020, 08:13 PM
trigger04
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The + or - doesn’t help you unless you have a way of measuring pinion depth. Even then, it just gets you into the ball park. The pattern tells you everything you need to know. Take your time and have fun with it.
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post #6 of 7 Old 09-24-2020, 03:22 PM
80cj
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Start with the original depth shims. Remember any oil slingers or baffles have to be included to arrive at the proper shim thickness. Remember this: Pattern in the bottom (flank) of the ring gear indicates too thick a shim pack.
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post #7 of 7 Old 09-24-2020, 09:00 PM Thread Starter
PLM
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Yeah, I started with the original shim thickness, and went from there. It took me a few tries but finally got it where it looks good to me. I will post some pictures but I have not transferred them to my laptop yet. Next is the ball joints and front axles.
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