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What flexplate do I need?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 89GMCSuburban, Apr 6, 2004.

  1. 89GMCSuburban

    89GMCSuburban 1/2 ton status

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    89 with a 1 piece seal. I heard something about it being externally balanced... What tooth count is it?
     
  2. kennyw

    kennyw N9PHW Premium Member

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    Need more info on the motor... 358 a stroker that uses a 400 crank or is it just an over bored 350 with a 350 crank? The only Chevy V8's that are externally balanced are the 400 and 454 as far as I know. Unless you have one of those cranks you should only need an internally balanced flywheel/flexplate.
     
  3. 89GMCSuburban

    89GMCSuburban 1/2 ton status

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    350 bored .40 over
     
  4. 89GMCSuburban

    89GMCSuburban 1/2 ton status

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    the current flexplate has a little weight on it
     
  5. 83ZZ502_Jimmy

    83ZZ502_Jimmy 1/2 ton status

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    It should be a 14" 168 tooth 'plate. GM PN 14088761

    John
     
  6. kennyw

    kennyw N9PHW Premium Member

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    If your current flex plate came off that motor/crank before you rebuilt it, you have the right one. /forums/images/graemlins/thumb.gif
     
  7. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    the 1986 and later 350's are externally balanced only on the rear.
     

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