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  • Clutch / Torque Converter: Flex plate bolts powershift

    Does anyone know the size and a source. Napa. Advance ,ect.
    Mark Riesch
    New Bern, NC

  • #2
    Originally posted by TXmark View Post
    Does anyone know the size and a source. Napa. Advance ,ect.
    They are special bolts. They are thru bolts that have special heads that stop aginst a raised ridge on the crank. They go thru from the engine side and use special locking nuts on the flexplate. The threads are 3/8-24 not sure of legnth, but there are long for standard flywheel and short for flexplate.

    Try Stude parts venders for supply.
    sigpic

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    • #3
      Flex plate to torque converter ,
      I believe your describing flex to crank
      Mark Riesch
      New Bern, NC

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      • #4
        Originally posted by TXmark View Post
        Flex plate to torque converter ,
        I believe your describing flex to crank
        That is true, but you did say flexplate bolts, not torque converter bolts.
        sigpic

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        • #5
          3/8" coarse thread, 1/2" long grade 8 (9/16" head) also use flat washers under the head, and use red Loctite thread locker.(I looked...I was wrong, they're fine thread)
          Last edited by bezhawk; 03-25-2019, 07:52 AM.
          Bez Auto Alchemy
          573-318-8948
          http://bezautoalchemy.com


          "Don't believe every internet quote" Abe Lincoln

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          • #6
            I am not sure what the Purpose is of the "Original Special" Flex Plate to Torque Converter Screws were, but they were 3/8" as Bez said, but had oversize Heads 5/8" with radial Serrations on the Top of the heads, which must have had something to do with Locking.
            StudeRich
            Second Generation Stude Driver,
            Proud '54 Starliner Owner

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            • #7
              Anyone have a picture of those screws. They sound like place head screws. If you have one also take a picture under the head.
              David L

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              • #8
                Originally posted by StudeRich View Post
                .....5/8" with radial Serrations on the Top of the heads, which must have had something to do with Locking.
                Don't the radial lines indicate Grade 8?
                64 GT Hawk (K7)
                1970 Avanti (R3)

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                • #9
                  The lines on the head of a bolt generally indicate their grade. Three marks indicate grade 5. Six marks indicate a grade 8 bolt.

                  However, Studebaker and other makes of the era did have several specialized bolts.
                  Last edited by 4Gens4; 03-24-2019, 06:28 PM.

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                  • #10
                    No lines-grade 2, three lines-grade 5, six lines-grade 8. https://www.nutsandbolts.com/v1-bolt...-markings.html

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                    • #11
                      No, these are NOT "Lines", these are fairly Deep Grooves a bit "V" shaped, VERY Special (Locking?) Screws.

                      They are: G9409145 (3/8" -24 X 1/2") 6 Required. You could not find these anywhere now, unless a few are at some Studebaker Vendors.
                      Last edited by StudeRich; 03-24-2019, 01:59 PM.
                      StudeRich
                      Second Generation Stude Driver,
                      Proud '54 Starliner Owner

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                      • #12
                        I just checked some I have on the shelf...9/16" hex head not 5/8.
                        Bez Auto Alchemy
                        573-318-8948
                        http://bezautoalchemy.com


                        "Don't believe every internet quote" Abe Lincoln

                        Comment


                        • #13
                          3/8x5/8 NF grade 8 is what fit mine
                          With washers and loctite
                          Mark Riesch
                          New Bern, NC

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                          • #14
                            Originally posted by StudeRich View Post
                            No, these are NOT "Lines", these are fairly Deep Grooves a bit "V" shaped, VERY Special (Locking?) Screws.

                            They are: G9409145 (3/8" -24 X 1/2") 6 Required. You could not find these anywhere now, unless a few are at some Studebaker Vendors.
                            Can you post some pictures? They do sound like place head screws.
                            David L

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                            • #15
                              Originally posted by bezhawk View Post
                              I just checked some I have on the shelf...9/16" hex head not 5/8.
                              Well if you have Original G9409145 Screws, why did you not mention the shape of the special heads which is the current question?
                              The wrench size does not matter.
                              StudeRich
                              Second Generation Stude Driver,
                              Proud '54 Starliner Owner

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