Identifying a M22 while in the car

Discussion in 'Transmission & Driveline Topics' started by Elfmaze, Dec 5, 2017.

  1. Elfmaze

    Elfmaze Veteran Member

    909
    1
    May 23, 2002
    Pittsburgh PA
    I am going to look at a 1980 camaro that claims it has a M22 trans... I was thinking about where the numbers are and input spline rings... is there any way to verify that it has the trans he claims? I assume i will hear the classic M22 whine in first thru third... But cant an ST-10 also have that same whine(cases in that case might be different, i should be able to at least tell its a Munche housing I think)?
     
  2. BigBlock73

    BigBlock73 Veteran Member Lifetime Gold Member

    1,833
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    Jul 10, 2002
    Accord,New York
  3. BigBlock73

    BigBlock73 Veteran Member Lifetime Gold Member

    1,833
    13
    Jul 10, 2002
    Accord,New York
  4. BigBlock73

    BigBlock73 Veteran Member Lifetime Gold Member

    1,833
    13
    Jul 10, 2002
    Accord,New York
  5. 70 SS/L78

    70 SS/L78 Veteran Member Lifetime Gold Member

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    May 5, 2005
    Rockford, MN
    Depending on when the Muncie was made, starting in 1970 there was a letter added after the date code to designate if it was a M20, M21 or M22.
    For example P0A16C, the letter C = M22. This will be stamped on the Right side of trans. Usually the VIN is stamped there too.

    P = passenger
    0 = year
    A = month
    16 = day
    C = M22 ( B = M21) (A = M20)
     
  6. 70lt1z28

    70lt1z28 Veteran Member Gold Member

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    Oct 3, 1999
    Beavercreek, Ohio, USA
    I think it may have happened in 1969?
    http://www.camaros.org/forum/index.php?topic=10754.msg83223#msg83223
     
  7. Elfmaze

    Elfmaze Veteran Member

    909
    1
    May 23, 2002
    Pittsburgh PA
    Can you read the side numbers when its inside the trans tunnel? i guess you can get to the linkages easy enough. possibly its viable
     
  8. BigBlock73

    BigBlock73 Veteran Member Lifetime Gold Member

    1,833
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    Jul 10, 2002
    Accord,New York
    The numbers on the side "might or might not" help determine if it's a M22
    Internals could have been changed over the 45+ years since the trans has been manufactured
    You'll need to pull the side cover to know for sure
     
  9. 70lt1z28

    70lt1z28 Veteran Member Gold Member

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    Oct 3, 1999
    Beavercreek, Ohio, USA
    If it is the 1969 later trans, the code is easy to see while in the car. It is on the main case stamped vertically on the passenger side, next to where the tailshaft housing bolts on. When you find the speedo cable, it is just in front of it on the main case. There should also be a partial VIN number there that matches to the original car VIN.
     

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