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  1. #1
    Join Date
    Jul 2002
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    Mesquite, TX
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    Check my pattern please

    New gears, new carrier, old housing.

    Used the pinion shim the old gears had (.026)

    .195 shims driver, .180 pass. Backlash looks to be about .008 but I'm not positive I'm reading it right.

    Drive side:

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    Coast side:

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    Coast side is a little hard to read but if I'm reading this correctly - and I don't know that I am - I need a slightly thinner pinion shim?

  2. #2
    Join Date
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    Thinned out the compound and tried again.

    Drive looks very similar:

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    Coast side I don't know what to make of, it looks very even across the whole thing:

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    Is this actually okay?

  3. #3
    Join Date
    Sep 2008
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    Jacksonville, Florida
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    Wrap a towel around the yoke and twist and hold to create resistance. Turn the ring gear with a wrench from one of the ring gear bolts. Work the gear back and forth rapidly to make it pattern. Do this in several positions. This will give a true representation of pattern, just rolling the gear using the pinion will not.

    With that said, aftermarket gears suck. They won't pattern the same around the circumference, which is usually due to the fact the backlash is 0.001-0.003" different from one side of the gear to the the other. I've never had an aftermarket gear give a "text book" pattern. You'll have to find a happy compromise.

    Try putting the resistance on the pinion and see what your pattern looks like.
    Craig Scholl
    CJD Automotive, LLC
    Jacksonville, Florida
    904-400-1802
    www.cjdautomotive.com

    "I own a Mopar, I already know it won't be in stock, won't ship tomorrow, and won't fit without modification."

  4. #4
    Join Date
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    Thanks Craig! I'd not heard of doing it that way.

    I went ahead and did at three roughly equidistant points:

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    and

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    They looked pretty similar to where I was before but maybe it'll come through in the image more clearly?

  5. #5
    Join Date
    Sep 2008
    Location
    Jacksonville, Florida
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    I can see the pattern better.
    It’s pretty good. A thinner pinion shim would center your pattern instead of the slight offset heel/toe you have now, but your super close. Not sure it’s worth it, could run it as is with no issue.
    Craig Scholl
    CJD Automotive, LLC
    Jacksonville, Florida
    904-400-1802
    www.cjdautomotive.com

    "I own a Mopar, I already know it won't be in stock, won't ship tomorrow, and won't fit without modification."

  6. #6
    Join Date
    Sep 2008
    Location
    Jacksonville, Florida
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    And I see a big difference between the old pictures and the ones you just posted. If you didn’t change backlash between taking them, you can see how the two different ways change the pattern look.
    Craig Scholl
    CJD Automotive, LLC
    Jacksonville, Florida
    904-400-1802
    www.cjdautomotive.com

    "I own a Mopar, I already know it won't be in stock, won't ship tomorrow, and won't fit without modification."

  7. #7
    Join Date
    Jul 2002
    Location
    Mesquite, TX
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    Thanks again Craig... I was more thinking what I could see with the naked eye seemed the same but I'm glad you could make it out with the new ones.