External Turbo 400 gasket kits

Discussion in 'The "Juice Box"' started by rkammer, Feb 18, 2024.

  1. rkammer

    rkammer Gold Level Contributor

    I've got several tranny leaks including the speedometer housing and the pan. (and others) I've heard that the speedo housing gasket is hard to find. Will this kit provide the speedo housing gasket(s) and all the other external gaskets needed to fix my leaks? My Turbo 400 is the original 1970 unit.

    https://www.ebay.com/itm/324180834179
     
  2. 69WILD

    69WILD Ron

    I would use a rubber (neoprene) pan gasket not the cork. Be sure to examine pan flange to make sure its flat all the way around by holes especially.

    I thought speedo seal was an oring?
     
    Last edited: Feb 18, 2024
  3. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Last edited: Feb 18, 2024
  4. rkammer

    rkammer Gold Level Contributor

    It's the original seal but, after replacing the drive gear to to correct for speedo error, it has leaked and gets worse as time goes by. How do I fix it?
     
  5. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    See above post. Not hard but could be messy. (Dexron shampoo) The part numbers are visible in the video. GM 15562374 for the large sleeve O ring, looks like a pack of 5. GM 1240382 for the smaller shaft seal.
     
    rkammer likes this.
  6. rkammer

    rkammer Gold Level Contributor

    Those part numbers and the video give me all I need. Thanks, Larry.
     
  7. BRUCE ROE

    BRUCE ROE Well-Known Member

    One of the problems is the shift shaft getting rusty, then the rust
    messes up the seal. Now replacement shafts are available.

    The plastic speedo driven gear can be so worn, it does not touch
    the seal anymore. Possibly a second seal could be put in to
    contact another spot, but I just replaced the gear. Bruce Roe
     
    rkammer likes this.

Share This Page