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Quick question... Flexplates...700r4 vs th350

Discussion in 'The Garage' started by big83chevy4x4, Oct 12, 2003.

  1. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    my flexplate on my k20 th350 is broke (several pieces). i have a couple of them laying around that will fit a 700r4, Will these fit?
     
  2. Batmanjr

    Batmanjr 1/2 ton status

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    I believe, Hopefully someone else will post to clarify, that the flexplate is only dependant on the engine! A flexplate, will bolt to any tranny, but the right flexplate has to be used for the right engine... Internal vs external balance... Again, hopefully someone will post prove this right or wrong! /forums/images/graemlins/thumb.gif
     
  3. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    First off there are 2 different flexplates for SBC up to 1985 excluding the 400 SBC which is all by itself due to the external balancing.

    First flexplate has a 14" diameter, 168 tooth, with both a 10 3/4" and 11 1/2" converter bolt pattern, GM #471598.

    Then there is another flexplate which is 12 3/4" diameter, 153 tooth, with a 9 3/4" and 10 3/4" converter bolt pattern, GM #471529.

    Now there are also 3 different flexplates for 1986 and up SBC with one piece rear main seals.

    The first one is 12 3/4" diameter, 153 tooth, with 10 3/4" converter bolt pattern, GM #14088765

    Then there is a 14" diameter, 168 tooth, with 11 1/2" converter bolt pattern, GM #12554824

    Then there is also a 14" diameter, 168 tooth, with both a 10 3/4" and 11 1/2" converter bolt pattern, GM #14088761
     

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