Transmission I. D.

Discussion in 'General Chevy & GMC Pickups Talk' started by 4JSAToo, Jan 6, 2004.

  1. 4JSAToo

    4JSAToo Member

    Joined:
    Apr 24, 2003
    Messages:
    160
    Location:
    Tucson
    3 speed manual out of a 55.1 Chevy Truck.
    Off of the left side of trans:
    GM
    3845122
    H254
    Thanks.
     
    4JSAToo, Jan 6, 2004
    #1
  2. WinCon

    WinCon Member

    Joined:
    Dec 2, 2001
    Messages:
    26
    Location:
    Midwest City USA
    Hi. 3845122 is the casting number of the transmission case for the 1955-1957 3 speed transmission for passenger cars and Corvettes.

    You need to look for some other numbers. According to the Chevrolet Pickup Red Book, for 1955 truck transmissions, serial numbers should begin with the following:

    M = 3 speed Muncie
    S = 3 speed Saginaw
    W = 3 speed HD Warner Gear
    T = 4 spe3d Toledo
    C = Powerglide Cleveland

    Winona
     
    WinCon, Jan 7, 2004
    #2
  3. 4JSAToo

    4JSAToo Member

    Joined:
    Apr 24, 2003
    Messages:
    160
    Location:
    Tucson
    Thats what is causing the confusion..No manufacture letters are on this trans other than GM and the numbers listed.
     
    4JSAToo, Jan 7, 2004
    #3
  4. WinCon

    WinCon Member

    Joined:
    Dec 2, 2001
    Messages:
    26
    Location:
    Midwest City USA
    I moved the shift ears and found the serial number on the upper right corner of the transmission when reading the casing number.

    I'm not good at this attachment stuff, so if you'll email me I'll send a picture of where I found serial numbers on all three of my transmissions.

    WLa4205955@aol.com
     
    WinCon, Jan 8, 2004
    #4

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