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    Author Topic: small or large bolt pattern for flex plate?  (Read 1623 times)

    Offline shadango

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    small or large bolt pattern for flex plate?
    « on: October 08, 2009 - 10:48:09 AM »
    I am getting ready to order a TCI flexplate from Summit and need to find out if I have a "small" or "large" bolt pattern crank....

    Guess i would have to actually measure it?

    « Last Edit: October 08, 2009 - 11:12:17 AM by shadango »
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    Offline Chryco Psycho

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    Re: small or large bolt pattern for flex plate?
    « Reply #1 on: October 08, 2009 - 10:51:48 AM »
    the crank is the same bolt pattern , you need the flex plate to match the bolt pattern on the converter though
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    Offline shadango

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    Re: small or large bolt pattern for flex plate?
    « Reply #2 on: October 08, 2009 - 11:01:24 AM »
    Well, thats what I thought too..

    But on the TCI site, they have this info:

    part#145600  All T/F  318-440  internal  small bolt circle, 5/16" bolt, 6 hole forged crank 
     
    part#145700 All T/F  318-440  internal  large bolt circle, 5/16" bolt, 6 hole forged crank 

    I was assuming the "bolt circle" meant the crank.   Does it mean the bolt circle on the converter?   If thats the case, the breakaway is an 11", so I would need the  "large" one?

    Not sure which I would need.  Going to get a TCI Breakaway.

    Also, I had bought new 5/16" bolts....the ones that need the 6-sided socket.....for the first install and re-used my crank bolts.

    Do I have to buy all new bolts? Or can I re-use what i have safely if i locktite?
     
    « Last Edit: October 08, 2009 - 11:57:58 AM by shadango »
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    Offline tactransman

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    Re: small or large bolt pattern for flex plate?
    « Reply #3 on: October 08, 2009 - 02:12:07 PM »
    You need the small one for the Breakaway.
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    Terry-tactransman 
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    Offline tactransman

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    • 1973 Challenger- Member here since April 14, 2006
    Re: small or large bolt pattern for flex plate?
    « Reply #4 on: October 08, 2009 - 02:13:42 PM »
    ....also reuse the bolts and Loctite.
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    Terry-tactransman 
    Torqueflite/Automatic Transmission Specialist
    Union, Mo.
    Give a man a fish and he eats for a day,teach him to fish and he eats for a lifetime.

    Offline shadango

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    Re: small or large bolt pattern for flex plate?
    « Reply #5 on: October 08, 2009 - 02:25:44 PM »
    Thanks Terry....you are a man of many answers!   :2thumbs:
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    Offline shadango

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    Re: small or large bolt pattern for flex plate?
    « Reply #6 on: October 08, 2009 - 02:28:05 PM »
    Ok,,,,one more for Terry....

    So the Breakaway is a 10" bolt pattern?  Is that what a stock converter is?

    The Summit site says "3/8" bolt" in the description for the small bolt pattern one...

    What are they referring to??

    http://www.summitracing.com/parts/TCI-145600/
    « Last Edit: October 08, 2009 - 02:30:32 PM by shadango »
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    Offline tactransman

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    Re: small or large bolt pattern for flex plate?
    « Reply #7 on: October 08, 2009 - 03:11:07 PM »
    The Breakaway has 5/16 bolts (like stock) The 3/8 holes will work,but they will be a little bigger than normal.


    This one will work,and it's cheaper.

    http://chucker54.stores.yahoo.net/man10con.html
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    Terry-tactransman 
    Torqueflite/Automatic Transmission Specialist
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    Give a man a fish and he eats for a day,teach him to fish and he eats for a lifetime.

    Offline shadango

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    Re: small or large bolt pattern for flex plate?
    « Reply #8 on: October 08, 2009 - 05:15:03 PM »
    Quote from: tactransman on October 08, 2009 - 03:11:07 PM
    The Breakaway has 5/16 bolts (like stock) The 3/8 holes will work,but they will be a little bigger than normal.


    This one will work,and it's cheaper.

    http://chucker54.stores.yahoo.net/man10con.html

    Yeah, that is definately cheaper....half the price.....it looks exactly like the one I have...LOL

    Nothing to be gained by gettng the TCI  then? 
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    Offline tactransman

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    Re: small or large bolt pattern for flex plate?
    « Reply #9 on: October 08, 2009 - 05:17:17 PM »
    Quote from: shadango on October 08, 2009 - 05:15:03 PM
    Nothing to be gained by gettng the TCI  then?
    Nope!  :grinno:
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    Terry-tactransman 
    Torqueflite/Automatic Transmission Specialist
    Union, Mo.
    Give a man a fish and he eats for a day,teach him to fish and he eats for a lifetime.

    Offline shadango

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    Re: small or large bolt pattern for flex plate?
    « Reply #10 on: October 08, 2009 - 05:22:28 PM »
    Cool...Thanks!  Maybe I will see if Mancini's has a cooler too....save some shipping.

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