Help ID-ing a transmission.

Discussion in '40- & 55-Series Tech' started by Combat Chuck, Feb 23, 2009.

  1. Combat Chuck

    Combat Chuck

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    I'm trying to figure out just what transmission I have in my '72. I know it rolled off the lot with a 3-speed, since that was the norm for that year model, but it now has a 4-speed, and a 1980 350 Chevy engine in it. Crawling around underneath the car has revealed a short (maybe a foot long) overall assembly length. The engine swap was done in a moderately rural area (anyone familiar with Willits, CA?) which makes me think that the installer is more likely to take a whole drive train from pick and pull, and not invest in an adapter.

    Are there any distinguishing features I should look for to identify the transmission? I think it's an SM465, though the actual case is covered oil, which has gathered a thick layer of dirt, obscurring markings. (which smells of GM*) I plan on taking the tranmission hump cover off before work tomorrow, so I can look at the gearbox, any landmarks I should keep an eye peeled for?

    *I meant that as a joke, I grew up in chevy trucks and now drive an Olds as a daily driver, and they all dropped gear oil/tranny fluid faster than the french army dropped their rifles in WWII.
     
  2. Cee Jay

    Cee Jay

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    465s have very large ribs that run front to back and there are two rows of them, with a PTO output on the driver's side. See here buddy and good luck!

    Domestic Truck Tranny Guide
     
  3. green71fj

    green71fj

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    pics please
     
  4. Combat Chuck

    Combat Chuck

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    Interesting info. Thanks. I'll post a few pics tomorrow, my home internet's too slow to upload.
     
  5. Combat Chuck

    Combat Chuck

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    Alright, it took me a while to get the pictures, I couldn't find my camera.

    This tranny looks alot like an older SM420 I had in my old '65 Chevy C-10.
     
  6. Combat Chuck

    Combat Chuck

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    pictures didn't load. crud. I hate dial-up.
     
  7. mcwinery

    mcwinery

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    Hey CC,
    First welcome to MUD and For us visually impaired you need to increase your font size.

    fellow Northern California Mudder
     
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