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How many bolts in TH400 torque converter?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Smitty, May 20, 2001.

  1. Smitty

    Smitty 1/2 ton status

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    I was checking the bolts holding the torque converter to the flex plate today and noticed something odd. The converter has 6 threaded holes for the bolts but only 3 of the holes line up and have bolts in them. The flex plate has 6 holes but 3 of them are about 1/2" out of alignment with the converter. Is it possible that someone has put the wrong flex plate in the truck? If so, does anyone have the right part number?

    Smitty
     
  2. thatK30guy

    thatK30guy 1 ton status Premium Member

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    No. Many torque convertors have 6 mounts for the bolts and nuts. You only need to use 3. They are the small and large bolt pattern. Notice 3 of them are closer to the center than the other 3. You just have to turn the convertor until the bolt holes line up. Many tranny shops used to ask what size pattern you would require. Many people were confused. So pretty much all convertors started having both small and large bolt patterns made into them to create less confusion.

    When In Doubt, Whip It Out!
     
  3. Smitty

    Smitty 1/2 ton status

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    Makes sense to me. Thanks for the info.

    Smitty
     

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