318 to 360 LA Swap. Trans mounting Problem.

Transmission and Drivetrain Tech

  1. jtn2655

    jtn2655 New Member

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    Hey all you wizards,

    I recently rebuilt a ‘77 360 LA. While putting into my ‘72 Dart (Original 318) I’ve run into nothing but problems. My most recent is not being able to match up the bottom 2 bolts from the block to the original 904 trans in the car. There is about a 1/2 inch gap in between them. I’ve jacked the engine up and jacked the trans up and every combination of the 2. Not to mention the B&M flex plate (part no.BMM-10236) won’t get closer than about an 1/2 away from converter. Anyone with ideas help me please.
     
  2. Commando66

    Commando66 She's a beaut Clark!

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    Is the torque convertor seated all the way? Three "clunks" while rotating into the pump?
     
  3. eekvonzipper

    eekvonzipper My Member is Legendary! FABO Gold Member

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    Yeah, You Have to Spin and Push the Converter until it Seats... Did You Do That?
     
  4. SGBARRACUDA

    SGBARRACUDA ROY FABO Gold Member

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    Good way to break the ears off the front pump gear. If you forced it together they are probably already broke.
     
  5. CudaFactHackJob

    CudaFactHackJob FABO Gold Member FABO Gold Member

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    Oh hellno, none of that turn, clunk, clunkity turn stuff...place a straightedge across the front of the trans. Measure back to the converter pad, with the converter turned so that the pad you are measuring to is either to your right or left, not top or bottom. Then measure from the back of the block to the back of the flexplate. The trans measurement has to be MORE; by like 1/8"
     
  6. Heywodja

    Heywodja The Heartbeat Stops Here FABO Gold Member

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    The engine or transmission could also be slightly rotated off axis which prevents the two dowel pins on the transmission from engaging the back of the block properly.

    upload_2021-2-14_8-10-31.png
     
    • Agree Agree x 1
    • moparzepjr

      moparzepjr New Member

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      make sure you dont have a dowel pin from the 318 still stuk in the trans bell
       
    • CudaFactHackJob

      CudaFactHackJob FABO Gold Member FABO Gold Member

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      Cut some bolts off and grind them to a point and screw them into the block to guide the trans on. About 2" long.
       
    • moparmarks

      moparmarks zippindippintie FABO Gold Member

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      I do this with 4-speeds. Works great.
       
    • moparmarks

      moparmarks zippindippintie FABO Gold Member

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      Nothing but crickets from the OP.
       
    • SGBARRACUDA

      SGBARRACUDA ROY FABO Gold Member

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      That is a good idea. Ive done that for installing front pumps on transmission when i rebuild them.
       
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