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Thread: Shimming diffs?

  1. #1
    RC Racer
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    May 2012
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    Atlanta, GA
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    Shimming diffs?

    Hi guys so heres a question to those of you who have shimmed your differentials. How tight should the diff be, once installed using shims. Also can you re-use shims you previously used?

  2. #2
    RC Qualifier
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    The diff should not be so tight that theres resistance when you turn the wheels by hand. In my stock diffs and bulkheads, three shims seems to be the magic number. Some of the more expierienced guys on here will tell you to re-shim after a couple hours runtime. That's probably pretty sound advice.
    addicted much....

  3. #3
    RC Champion
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    I have 4 in each of mine. Tolerances will differ from truck to truck. My back drags A LITTLE, but itll loosen up over time.
    yes, you can re-use them all you want.
    Welcome to Traxxas.com Yes, EVERYONE here IS a Pro Racer.... [/sarcasm]

  4. #4
    RC Qualifier
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    My mini slash has 3 and it was a little to tight at first. But after about 30 mins of runtime, it seems to have loosened up a little. I'll probably put a fourth in next time I tear it apart.
    addicted much....

  5. #5
    RC Turnbuckle Jr.
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    You can leave it a little tight if its a new ring gear. It will loosen up after driving

  6. #6
    RC Turnbuckle Jr. Jimmie Neutron's Avatar
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    You can reuse shims too.
    Whatever it is I just said... I could be wrong.

  7. #7
    RC Turnbuckle Jr. mike-susieq1's Avatar
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    I have just 1 shim in the front and its a little tight I've ran 5 packs through and its still tight! I'll leave it like that so I don't have to mess with it again and rear has 3 shims not tight just right. I have the older non set screw to hold the diff case together.
    DEU 8:18 ESV

  8. #8
    RC Qualifier
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    I just loosened the screw that holds the diff together like a quarter or half turn. Then when it breaks in a little I can just tighten it back down and things will fit just right.
    addicted much....

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