CamaroNmotion
Veteran Member
January 1974 is when the memo was released about the trans. change , it was a rolling change. GM wasn't going to scrap a bunch of Muncies because of a memo exactly in January that day.....what they did is use them up till there gone. BTW I am the original owner of my car, its a 2B build and has the M20 MUNCIE trans and this is the same trans that is in the car today.That sure is odd. Mine is 4N189 built 04B and has T10 and points. Anything I had ever heard about the Muncie transmissions was they were no longer installed after January '74