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420A STEEL SYNCHRONIZERS???

Posted by BLACK'98DSM, Mar 29, 2020

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  1. BLACK'98DSM

    BLACK'98DSM Proven Member

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    I was wondering how exactly do I need to press apart the shaft for replacing the 1/2 synchro.

    Thanks.

    EDIT: While inspecting the gear stack, I noticed that my synchronizers did not look like the stock fiber material, nor did they look like brass ones. I tried scratching one lightly on the squared ring section, and it was metal for sure. Then I was able to stick a magnet to it. So, I thought that the stock synchronizers were made of a "compressed paper" or a "fiber mesh"? I haven't found any steel synchronizers on the market, and can't find any threads referring to them.

    Do I have some type of special custom made synchros? Is there there a missing piece of information in the NV-T350 world?
     
    Last edited: Mar 29, 2020

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  2. silvreclips

    silvreclips Proven Member

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    The stock synchros are steel with a bonded fiber material. When you get them apart you will understand.
     

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    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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  3. BLACK'98DSM

    BLACK'98DSM Proven Member

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    Understand what? I'm holding one right now and it just looks like steel.
     

    Road Race Build 3K  10  25

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

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    2008 Tomberlin Crossfire 150R
    rwd · manual · Misc Vehicles

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  4. silvreclips

    silvreclips Proven Member

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    There are 2 different synchros in our trans. 1st and 2nd are a double synchro. The inner cone has fiber material on the inner and outer surface. The 3,4,5 and reverse synchros only have fiber only on the steel tooth part. Post a picture of what you have
     

    Autocross Build 519  1

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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  5. BLACK'98DSM

    BLACK'98DSM Proven Member

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    I see it now. The inner diameter has the fiber like ring on it. And the outside is made of steel. Now I understand.

    So why do people hat on the steel ones so much? Brass wears much quicker than steel and is louder under friction.
     

    Road Race Build 3K  10  25

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    103  3

    2008 Tomberlin Crossfire 150R
    rwd · manual · Misc Vehicles

    143  6

    2008 Tomberlin Crossfire (325 swapped)
    rwd · manual · Misc Vehicles
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  6. silvreclips

    silvreclips Proven Member

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    Here is a stock double synchro on 1 and 2.
    IMG_20200329_193314.jpg

    Here is the synchro for 3 4 and 5.
    IMG_20200329_193451.jpg

    In the background you can see a replacement brass synchro. Also seen below.

    IMG_20200329_193515.jpg

    The stock steel synchros are hands down the best. The brass does work but it's noisy when the trans fluid is cold. I had a trans rebuilt years ago and they used that brass synchro on 2nd gear. It always sounded like rocks were inside the trans at start up. When I rebuilt it later on I took it out and put in a used 2nd synchro bc I hated how it sounded.
     

    Autocross Build 519  1

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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