Need help with a GM 4spd

Discussion in 'U-shift em' started by staged70, Nov 5, 2015.

  1. staged70

    staged70 RIP

    A neighbor just got a transmisson given to him it looks like a Muncie but I cannot seem to decode it . Where my GS 4 spd is stamped his has this number J 149513 I am wondering if its a Borg Warner as I did not really look that close but it sure looked like a Muncie in the dark garage. Anyone ?
  2. knucklebusted

    knucklebusted Well-Known Member

    A picture would be worth a lot.

    Otherwise, plenty of images to compare it to on the web.
  3. crash

    crash Well-Known Member

    If its an older Muncie that could be the VIN of the car it came out of...

    "J" in the VIN stands for Janesville Wi. they built full sized Chevys there, then the 6 vin numbers...

    Hope this helps... Crash
  4. David Hemker

    David Hemker Well-Known Member

    7 bolts on the side cover and a straight bottom on the side cover = Muncie
    9 bolts on the side cover and a rounded bottom on the side cover = Borg Warner

  5. staged70

    staged70 RIP

    I'll try to get a look in the daylight. he was told it was from a BBC starter is on the right side like a Buick. The output is way smaller than the one I have from my 71 GS. may very well be from a bigger chevy
  6. philbquick

    philbquick Founders Club Member

    Is that true for the super t-10 and the older (57 - 63) t-10?
  7. BadBrad

    BadBrad Got 4-speed?

  8. David Hemker

    David Hemker Well-Known Member

    If it is a Muncie the smaller output shaft (same as turbo-350) will be 1970 & older with a 10 spline input shaft. In 1971 the input shaft was changed to fine spline and the output shaft was made larger (same as turbo-400) as well.
  9. staged70

    staged70 RIP

    Thats what I have Doug the fine spline and large output. I have rebuilt these in the past so I was sure it was a muncie mid to late sixties was my guess

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