1960 Powerglide output shaft and planetary gear - NCRS Discussion Boards

1960 Powerglide output shaft and planetary gear

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  • Michael H.
    Expired
    • January 29, 2008
    • 7477

    #16
    Re: 1960 Powerglide output shaft and planetary gear

    Originally posted by David Edwards (4632)
    So if this is true, what possible difference can there be between the two part numbers? Has or can anybody compare the two side by side?
    Thanks, Dave
    If the old cast iron glide is anything like the later aluminum unit, there could be a difference in gear ratio for low gear from one PG to another. (for example, a PowerGlide for a 327 has a different ratio low gear than one for a 283) That would also require a different ring gear for the planetary gear set.

    If that's the case, that would explain the different part numbers for pass and Corv.

    Edit: I just looked in a 63 printing of the parts book. I'm wrong. The rear ring gear is the same part number for both pass and Corvette so the planetary gear and shaft must be the same ratio for both.

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    • Mike D.
      Very Frequent User
      • July 31, 1996
      • 303

      #17
      Re: 1960 Powerglide output shaft and planetary gear

      I have a 60 corvette powerglide sitting in my garage but it needs a good cleaning to see all the numbers. I found a couple. The tailshaft seems to be about 8 inches in length.
      Mike
      Originally posted by Bruno Vernerey (50450)
      Thanks Dave !
      As the Corvette tailshatf housing (With the 3 bossings) is longer than a car (not Corvette), I am expecting the Corvette planetary and shaft assembly to be longer as well. Looking forward to getting the measurement of an original Corvette planetary and shaft assembly to get a confirmation or ???
      Best regards
      Bruno
      Attached Files
      Mike Doty
      Intermountain Chapter Judging Chairman
      Region VIII Director

      Comment

      • Bruno V.
        Expired
        • May 21, 2009
        • 4

        #18
        Re: 1960 Powerglide output shaft and planetary gear

        My Corvette tailshaft housing with the 3 bossings (Casting # 3726595) is also a shade over "7 inches from transmission mating surface to end of the tail housing. My passenger car tailshaft housing (Casting #3742356 or 3742355 --> difficult to read) is much shorter (About 5 inches long). The cast iron PG transmission I am trying to convert for my 1960 Corvette is originally coming from a 1960 GM Belair.
        Bruno

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