14 Bolt Gear Pattern

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CivecamNC

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What are your thoughts on this gear pattern?

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bucket

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A couple of those teeth look pretty good, but the other ones don't look so hot. Have you checked it in another area of the ring gear?
 

CivecamNC

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A couple of those teeth look pretty good, but the other ones don't look so hot. Have you checked it in another area of the ring gear?
Not yet. I ran out of time today but was thinking the same thing. Hopefully I do not have a runout problem. I only changed the bearings and put in a locker.
 

bucket

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Maybe there's a little bit of debris between the ring and the carrier, and you just happened to find that spot on the first check.
 

CivecamNC

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Added a few pics of the quick pattern from tonight. Looks more consistent tonight. I was able to put constant turning force on the pinion so no starting and stopping. If I am thinking of it correctly I need to remove shims on the pinion

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NotKewl

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Yes, use shims to move the pinion. Removing them will place the pinion closer in. Adding more shims moves it out toward the edge of the ring gear. Get it centered nicely and you should be good.
 

CivecamNC

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Yes, use shims to move the pinion. Removing them will place the pinion closer in. Adding more shims moves it out toward the edge of the ring gear. Get it centered nicely and you should be good.
That makes sense to me but some of the articles I see are saying to decrease backlash to fix this. Am I missing something? My backlash was at 008 so I was happy with that.
 

Blue Ox

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This is what the GM manual has to say about it:

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CivecamNC

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This is what the GM manual has to say about it:

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That is what I was seeing too. I could have swore when I looked at Billavista that it said decrease pinion shim though. Either way I can’t get back to the storage shed until this weekend. Guess I will try backlash first and see what happens.
 

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Backlash is pretty easy on a 14 bolt. I'd definitely try that before I started monkeying around with pinion shims.
 

71RAT

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Decreasing backlash will more pattern inwards, but your allready at .008. .006 is tightest I'll go. I'd take .002-.003 out from the pinion. For what it's worth , most of those aren't that bad.
 

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