C1: Steering worm gear - NCRS Discussion Boards

C1: Steering worm gear

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  • Terry B.
    Expired
    • December 1, 1988
    • 111

    C1: Steering worm gear

    I have noticed two different profiles on the steering worm gear. On one the top of the worm is rounded and on the other it is flat. Sometimes listed on EBay with the flat type being for the 56 57 years. Been told that both were used for all C1's. Are they interchangeable for all 53 thru 62 Vette's? Is the roller the same for both of these gears?
  • Richard M.
    Super Moderator
    • August 31, 1988
    • 11323

    #2
    Re: C1: Steering worm gear

    I don't have the definite answers, but I just looked up some pages from my 29-59 Parts book. They do not list the worm separately between the years. They do however show the.....

    SHAFT, Steering gear, w/Worm

    53-57 CORVETTE (56 1/8" O.L.) -----------5666148
    58-59 CORVETTE (51 1/4" O.L.) -----------5672001

    There is no separate part# for the worm. I don't think it was ever sold OTC individually as it was press fit on the shaft. However, I have removed and replaced worms on shafts in the past with positive results. New kits include just the worms, sector rollers, bearing etc so it's done frequently.

    On another note, the ST-12 53-62 Service manual on page 9-7 shows the parts breakdowns, and no differentiation for the years, but the above reference shows the 2 part #'d shaft assemblies. I could find no separate part number for the Sector Roller bearing either, but I would think it's also the same for 53-62.

    Rich

    Comment

    • Terry B.
      Expired
      • December 1, 1988
      • 111

      #3
      Re: C1: Steering worm gear

      Vette Gal has a "flat top" type worm gear on EBay now and it is listed to fit 53 thru 57 Corvettes. I have one of each but hesitate to use the flat type which is the least common in my experience. Suspect you are correct that all of the used ones circulating today were removed from original GM assembled steering shafts.

      Comment

      • Richard M.
        Super Moderator
        • August 31, 1988
        • 11323

        #4
        Re: C1: Steering worm gear

        I recall that when I had my '59 apart years ago, it did not look like that one in the ad. From vettegals' ad..........



        It was more rounded at the top, and the "teeth" of the gear seemed more rounded too.

        Zip has the kit, marked as "58-62", Here. Appears to be rounded teeth.


        I also looked at the Corvette Central site. There's is marked "53-57" and has the rounded teeth on the worm. Here is the CC photo of their part#561026. Rounded.

        Now I'm confused too!


        ====
        Attached Files

        Comment

        • John F.
          Extremely Frequent Poster
          • March 23, 2008
          • 2405

          #5
          Re: C1: Steering worm gear

          Call Tom Parsons!

          Comment

          • Bill M.
            Extremely Frequent Poster
            • April 1, 1977
            • 1386

            #6
            Re: C1: Steering worm gear

            Here's the original from my '59:

            Comment

            • Jim L.
              Extremely Frequent Poster
              • September 30, 1979
              • 1808

              #7
              Re: C1: Steering worm gear

              How on earth, with '50s technology (read: no CNC) did anyone reliably and repeatedly manufacture such a complex part?

              Expiring minds want to know....

              Originally posted by Bill Mashinter (1350)
              Here's the original from my '59:

              Comment

              • Troy P.
                Extremely Frequent Poster
                • February 1, 1989
                • 1284

                #8
                Re: C1: Steering worm gear

                Same way they built the pyramids. Aliens?

                Comment

                • Bill M.
                  Extremely Frequent Poster
                  • April 1, 1977
                  • 1386

                  #9
                  Re: C1: Steering worm gear

                  Originally posted by Troy Pyles (14528)
                  Same way they built the pyramids. Aliens?
                  The guy who figured out how to machine this part also designed the Friden mechanical calculator that would do square roots...

                  Comment

                  • Dan D.
                    Extremely Frequent Poster
                    • November 5, 2008
                    • 1323

                    #10
                    Re: C1: Steering worm gear

                    I think it would be equally as hard to made a drawing for this. No CAD. -Dan-

                    Comment

                    • Paul J.
                      Expired
                      • September 9, 2008
                      • 2091

                      #11
                      Re: C1: Steering worm gear

                      Don't you guys remember the paper punched tape NC (numerical control) machines. I've used them before, and they were a marvel of engineering, well before computers, CNC, CAD, and CAM. As for drawings, I spent part of my first two years in college (and my first year of employment) sitting at a drafting table.

                      Comment

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