1954 auto.transmission leak fix

I'm looking to fix a little leak in my 54' automatic transmission caused by seals. I would like to know if there is a specific product to fix those kind of leaks or if any can do. 

Thanks in advance 



  • 54coupe54coupe Posts: 107Member
    Are you looking for a "mechanic in a can" fix?

  • Max162Max162 Posts: 12Member
    The leak comes from the seals that may be a little dry. I did ask to the previous owner that has made the entire restoration of the car about it and told me to search for a auto trans. additive for fixing the said leak. Any advice would be appreciated.

  • squirrelsquirrel Posts: 82Member
    It's not easy to fit a mechanic into a can. I doubt you'll get an additive to fix the seals for you. You can give it a try, there are several stop leak additives available in the "snake oil" section of most auto parts stores.
  • Max162Max162 Posts: 12Member
    I do agree, a mechanic is hard to fit in a can. I simply want to reduce the frenquency of adding fluid every time I stop.

  • squirrelsquirrel Posts: 82Member
    Try stop leak (or a teaspoon of brake fluid), but don't be too disappointed if you need to actually fix the seals by replacing them. There is more to it than just "dry rubber"

  • 54coupe54coupe Posts: 107Member
    Some of these additives work by softening the seals. If you leave them in, they soften them until the seal falls apart. If you use this kind of product, and it works, drain and change to fresh trans fluid, so the additive is gone, and doesn't mess up the seals by making them too soft. Then plan on changing them at a convenient time in the not too distant future. Remember, the additive is a "Band Aid" until you can do it right.
  • onerare39onerare39 Posts: 1,009Expert Adviser, Moderator
    When looking for seals, remember that Hudson used two different transmissions in 1954.  The standard Dual-range Hydramatic and the replacement Borg Warner (DG-200).  Make sure you know which one you have before you start looking for seals.

    A fire destroyed the Hydramatic transmission factory on August 12, 1953. 
  • Ol racerOl racer Posts: 2,455Senior Contributor
    edited June 26

    If its just a little leak don't put in those Stop Leak products, instead slide a small pan available at any Dollar General under where you regularly park. If any consolation,  modern Transmissions in Hot Rods & Classics that set a lot drip from the seals too. Do check it occasionally though.

  • Max162Max162 Posts: 12Member
    Got some update for the transmission leak and it looks like I got to fix it by changing any seal. Thanks to your advices, I didn't put any additives as I had the feeling that it wasn't a going to fix it anyway (it was a good call from you). Unfortunately, as day goes by, it seems that I'm losing more trans. fluid and I still need to find the exact place where it leaks.

     Right now I have a guess the leak is between the torque converter and the transmission, but I'll have to crawl under the car to check it closer as I want to make sure I get the right seals to fix it properly. My transmission is a Borg Warner DG-200. I'll give an update when I'll have more info on this issue.
  • GlowplugGlowplug Posts: 1,674Expert Adviser
    Mike Madden of Knoxville Tenn. redid his DG-200 might check with him. 
  • Ol racerOl racer Posts: 2,455Senior Contributor
    edited July 2


    If the leak is pretty bad its probably coming from the front seal and requires removal from the car to replace. If the transmission works good otherwise, I suggest having it repaired unless your capable and have a trans jack, stands, etc.

    Many Trans shops are reluctant to do 'major' repairs on an older Trans since they don't have the Manuals, Senior Mech's have retired, and/or a Source for necessary parts, however, if your Trans works good and just needs a front Seal its a simple replacement job for them. Shops may say cant find a new Seal or Torus Gasket but our Club has a Source for whatever Parts needed. The Supplier for Seals,  Gasket and whatever parts needed is Dave Edwards  781 449 2065 www.autotrans.us.

    Additionally, Most Towns/Cities have a local Tranny Shop and if you obtain the Parts they have the Equipment to do the Job, and R&R a Front Seal doesn't really need a Manual for an experienced Tech. I would replace the rear seal too....Lastly, If the BW Trans has other problems and needs rebuilt, I suggest find a more durable Hydro to rebuild.

  • Ken U-TxKen U-Tx Posts: 3,631Senior Contributor
    Plusieurs marques de voitures britanniques ont utilisé la boîte de vitesses automatique Borg-Warner DG-200. Ma suggestion est d'appeler un atelier de réparation spécialisé dans les Jaguars plus anciens, ils pourront peut-être vous aider. Britannicar à Lachal, QC semble être fortement recommandé: http://www.brittanicar.com/index.php Bonne chance!

  • Max162Max162 Posts: 12Member
    edited July 5
    After some further tests and diagnosis, I will indeed need a new seal to stop the leak between the torque converter and the transmission.

     From the infos that I've found so far, I'll need the Front Seal # CR21100 (Timken 470898) or any front seal that will do the job nicely. I wonder if Dave Edwards have it as I've checked the web site and haven't seen it yet ( that can also be me being blind ).

    Thanks for your advices, it has helped me a bunch. 
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