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#8N17 Trans code...decode help

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  • #8N17 Trans code...decode help

    I can hardly get in there enough to tell what the numbers on the transmission are, but i found a number 8N17 or even 8NI7, on the pass side trans with a stamped oval encasing the numbers. Is that enough for a decode on what tranny i have or do i need more info from the tranny.
    Last edited by inheritance; August 8th, 2007, 07:00 AM. Reason: corrections
    59 - 390 Super Marauder- Hickory Tan Registry= http://www.tbirdregistry.com/viewdat...ryNumber=33831

  • #2
    I am looking at William Wonder's excellent book Thunderbird Restoration Guide 1958-66.
    For both 58s and 59s there is a section on Transmission I.D.s (pages 28 and 46).

    I believe the first number is for the year, so 1958 (8). The second character is for the month (N) and the last two are for the day (17). in your case.

    The tough part is the N. He lists January through December as being represented by A- M (I is not used).

    So my guess would be that yours translates to January 17 of 1959 at the tail end of the 1958 tranmission run. But that is truly a guess on my part and someone else might jump in here and set things straight or email an authority (which I ain't). A man named Alan Tast is perhaps the real expert on such matters.

    The good news is that it precedes the date of manufacture for your car, leaving open the hope that it is the original tranny.

    Is it a Cruis-O-Matic?

    What was the date of manufacture of your entire car??

    John
    58 Hardtop
    Last edited by JohnG; August 8th, 2007, 09:03 AM.
    1958 Hardtop
    #8452 TBird Registry
    http://www.tbirdregistry.com/viewdat...tryNumber=8452


    photo: http://www.squarebirds.org/users/joh...d_June2009.jpg
    history:
    http://www.squarebirds.org/users/johng/OCC.htm

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    • #3
      Tranny Code

      Inheritance John's suggestion is very sound. Check the VIN # and then you can work backwards to the tranny code and about when it was made. I would agree that at least it would appear that the tranny is original and should be a Cruise-O-Matic.

      John: Long time no talk. How are things on the east coast and I guess you are heading into fall soon with all the colours??

      Dano Calgary,Alberta Canada
      Dano Calgary,Alberta Canada
      Thunderbird Registry
      58HT #33317
      60 HT (Sold )

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      • #4
        John this is the second time you have Ref: William Wonder book what type book is this and where did you get it
        Bob M
        sigpic
        Bob M
        59 Bird
        72 Charger

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        • #5
          Originally posted by Bob M View Post
          John this is the second time you have Ref: William Wonder book what type book is this and where did you get it
          Bob M
          http://www.amazon.com/Thunderbird-Re.../dp/0760303908

          I have it... good reference book.
          sigpic
          Mike Lemmon
          '59 Raven Black Hardtop

          http://www.tbirdregistry.com/viewdat...tryNumber=2461

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          • #6
            Thanks, Mike!!

            Aaron, what do you find for a tag on the bell housing??? It might be interesting to compare the date of mfct of that with the tranny information.

            john
            Last edited by JohnG; August 9th, 2007, 07:37 AM.
            1958 Hardtop
            #8452 TBird Registry
            http://www.tbirdregistry.com/viewdat...tryNumber=8452


            photo: http://www.squarebirds.org/users/joh...d_June2009.jpg
            history:
            http://www.squarebirds.org/users/johng/OCC.htm

            Comment

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