Losi 8 rear diff shimming.
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Thread: Losi 8 rear diff shimming.

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    Default Losi 8 rear diff shimming.

    I am struggling to mesh nicely my rear diff & pinion, it just seems really tight and I have even tried no shims at all but still it doesn't spin very freely. I have looked at the stock setup from the manual but that is way to thick, don't have a chance.

    Any suggestions what the problem could be or something that I'm not doing right?
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    Truly Hardcore Basher s3nutt's Avatar
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    Sounds like something else is wrong,are you sure the gearbox inserts are inserted correctly? are they the right way round & sitting in the grooves correctly?
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    Also are all the bearings ok?Does seem strange to be tight even with no shims
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    I tried changing the diff to my other rear diff which is brand new, new bearings etc everything new on it and same result. Also changed the 2 bearings around the pinion gear. This is only a recent problem.
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    Extreme Basher Richardson's Avatar
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    Has the diff case/housing damaged or deformed in anyway?

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    Quote Originally Posted by Richardson View Post
    Has the diff case/housing damaged or deformed in anyway?
    I've tried a separate diff with all new parts so I don't think its that. Could the pinion be a possible problem? Such as wear?
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    Have you had the diff apart? I wonder if the cross pins in the diff are not quite right making the diff too wide.

    Edit

    Seems unlikely given your latest post

    Gearbox/bulkhead distorted?

    It sounds more like trying to put the inserts in backwards to be honest.
    Last edited by justleanitupabit; 16-02-2012 at 06:59 PM.

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    Quote Originally Posted by justleanitupabit View Post

    It sounds more like trying to put the inserts in backwards to be honest.
    Will double check later, I hope that is the problem even it is a school boy error

    UPDATE WILL COME LATER WITH THE RESULT.
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    If you have the newer style diff inserts (2.0 +EU) then they have a small square shoulder on the LH which needs to be seated correctly or it will not sit fully in to the casing.
    If you look from the side and you will se a small gap 1-2mm between the insert & the casing if not in fully.
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    u need x3 2.0 diff shims to fix this problem.
    try putting x1 shim on the side closest to where the gears meet and put x2 shims on the other side so it pushes the cogs closer together so when u put the break on they dont disconnect and make that horrible clicking noise.
    make sure u get the alloy diff holders. if you been using the standard plastic one chances are that there worn and been wobbling around and broke the diff case aswell.
    hope this helps

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