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  • Transmission / Overdrive: Torque converter interchange

    The ring gear on my 63 V8 automatic has a broken tooth. I have a converter from a 66 V8 car and was wondering if it is a possible replacement for the 63? I don’t have a 66 parts manual to check and see if the part numbers are the same. I could compare dimensions but I am may miss something and cause more work or damage. Does anyone know if this swap is possible? The starter is being fixed as it had drive gear damage. Ken

  • #2
    No, they are not interchangable. The tooth count on the starter ring is different and I think the '66 is larger in diameter too. Probably best to send your '63 converter to a reputable rebuilder who is familiar with these converters.
    "Burning Bridges...Lost Forevermore"......

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    • #3
      They are completely Different, the GM Engine Converter has NO attached Ring Gear or Teeth!
      StudeRich
      Second Generation Stude Driver,
      Proud '54 Starliner Owner

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      • #4
        Oops, that's right
        "Burning Bridges...Lost Forevermore"......

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        • #5
          It may be cheaper just to buy another TC from one of our vendors.

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          • #6
            Or if performance is your bag, I have a heavily modified Pinto torque converter which gives a great 3000 rpm launch with 3:73 gears in my GT Hawk.

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            • #7
              Originally posted by Buzzard View Post
              Or if performance is your bag, I have a heavily modified Pinto torque converter which gives a great 3000 rpm launch with 3:73 gears in my GT Hawk.
              A WHAT? Wouldn't it be a whole LOT simpler and cheaper, to just Modify the stall speed on a Studebaker Torque Converter?
              I would not think a Pinto would even HAVE a Borg Warner Transmission.
              StudeRich
              Second Generation Stude Driver,
              Proud '54 Starliner Owner

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              • #8
                I am confused now as it is a 66 transmission from very low mileage but very rusty Commander. It is water cooled and has the cable for throttle pressure. I took it out of the car 47 years ago. It has been sitting in the garage since. There is no bell housing but there has been a converter on the front and a yoke on the rear to keep it sealed up. Anyway the converter must have come from some other car as it has a ring gear on it. I just don’t remember having another converter and assumed it was a 66 converter. It may be one that can be serviced and returned to use. Ken

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                • #9
                  Possible SI would have a new ring gear. Part # 1539744. A trans shop can change it. I have changed them. Just need a die grinder with a cut off wheel and a welder.

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                  • #10
                    Originally posted by jd-stude View Post
                    I am confused now as it is a 66 transmission from very low mileage but very rusty Commander. It is water cooled and has the cable for throttle pressure. /Cut/ Anyway the converter must have come from some other car as it has a ring gear on it. I just don’t remember having another converter and assumed it was a 66 converter. It may be one that can be serviced and returned to use. Ken
                    Was your " '66 Ring Gear" Welded on or Screwed on? All GM Engines use a Plate called a "Flex Plate" that is a "Ring Gear" but it Bolts on.
                    StudeRich
                    Second Generation Stude Driver,
                    Proud '54 Starliner Owner

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                    • #11
                      I had the ring gear changed on a 1960 FlightOMatic. As mentioned above, Judith cut the old welds and weld the new one on, but I had it done by the pros in he’s that they would have a way to keep it true before welding.

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                      • #12
                        Rich,
                        A WHAT? Wouldn't it be a whole LOT simpler and cheaper, to just Modify the stall speed on a Studebaker Torque Converter?
                        I would not think a Pinto would even HAVE a Borg Warner Transmission.

                        As I stated "heavily modified".
                        Bill

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                        • #13
                          Well Bill, in a GT Hawk I assumed a Stude. Engine, but if it's a Big Block 427 or some-such yes, ANYTHING goes.
                          If it IS a Modified Stude. Engine, my first thought still applies.
                          StudeRich
                          Second Generation Stude Driver,
                          Proud '54 Starliner Owner

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