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Thread: Diff Shimming

  1. #1
    RC Champion PowerToTheMaxx's Avatar
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    Diff Shimming

    So, how does one shim a diff and where does one get the shims and what size.

    I have stock revo-spec diffs and I want to shim them. Do you shim the diff assembly side to side? Just the pinion gear?

    Part numbers and pictures would be very helpful, Ive been researching this for a while and have not come up with very conclusive answers as of yet.

    Thanks,
    PTTM
    This parrot is NO MORE!!! This is an ex-parrot!!!

  2. #2
    RC Champion NFS's Avatar
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  3. #3
    RC Champion PowerToTheMaxx's Avatar
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    Thanks. Very helpful.
    This parrot is NO MORE!!! This is an ex-parrot!!!

  4. #4
    RC Competitor
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    Can you give us the part numbers for the shims and where to purchase them?

  5. #5
    RC Qualifier ausprime's Avatar
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    I got my shims from AMain hobbies
    http://www.amain.com/search?s=shim&o=5
    Last edited by ausprime; 11-15-2014 at 08:32 AM.
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  6. #6
    RC Champion PowerToTheMaxx's Avatar
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    This parrot is NO MORE!!! This is an ex-parrot!!!

  7. #7
    RC Champion NFS's Avatar
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    The brand won't matter just make sure they are the right size 6mm, 8mm

  8. #8
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    Just to add my 2 cents.... I would get more than one thickness of each size (6 & 8mm ID). Also, i was in your shoes a couple months ago with shimming the stock diffs. I am now doing the 1/8 diff/flm hybrid bulk conversion. Yes shimming the stock diffs helps. But they are still going to blow out.on you. If you are going to stay with the stock diffs an alum diff case and/or diff cup will also contribute to durability of the diffs. i shimmed my stock diffs but still only got maybe 15 runs out of it before blowing one up. One of the pinion bearings disinegrated so that may have been the reason but still.... And given, i was also doing alot of jumping. Idk if that contributed to blowing one out but shimming alone wont completely solve the problem of stripping gears.i just decided that instead of buying new gears and rebuild kits over and over that i would do the 1/8 conversion and hopefully get much longer use out of them.

  9. #9
    RC Champion PowerToTheMaxx's Avatar
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    I know. Ive been strongly encouraged to get the FLM conversions, but I really dont want to spend the money right now. I just got nice bearings for the stockers and a new plastic case ($4 beats $30).

    My stock diffs have lasted me almost 4 years and would still be fine now if it wasnt for the bad bearings. If I was moving up to 5s or 6s and wanted to really hammer my truck, id get them but because Im sticking at 4s for a while and I run with pretty conservative MM2 settings Im going to stick with the stock setup. Also want to really test out my RPM bulks. Ive got nearly $1500 in RC hobby this year so im pretty much at budget anyway.
    This parrot is NO MORE!!! This is an ex-parrot!!!

  10. #10
    RC Qualifier ausprime's Avatar
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    Quote Originally Posted by NFS View Post
    NFS, you can't get a better reply to this thread then the above. Very nice!

    My FLM Combo bulks are still going strong.
    For stock diff gears, with the alloy cup.
    My RC Cycle:
    Build it, Drive it, Brake it.

  11. #11
    RC Racer
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    What bearings are you using? Boca, Acer, Avid?

  12. #12
    RC Qualifier ausprime's Avatar
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    I use BOCA and Avid.
    My most recent purchase was the Avid Revolution bearings. Metal on one side, and rubber on the other.
    My RC Cycle:
    Build it, Drive it, Brake it.

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