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transfer case leaking

Discussion in 'Truck & Equipment Repair' started by SharpBlades, Nov 13, 2010.

  1. SharpBlades

    SharpBlades Senior Member
    Messages: 366

    I have a 2002 silverado 2500 hd this past spring the transmission went out. I had it replaced with a jasper transmission.

    A couple weeks ago I was under the truck running my wiring for the spreader and noticed that the ATF is leaking out from where the transmission and transfer case come together.

    From what I can see, the transfer case is pitted pretty good and the leak is coming from a sloppy job with the rtv or whatever sealant was used at the connection. It is not leaking a lot, just enough to leave a few drops on the ground. When I checked the level it wasn't down more than a half quart.

    Is there anything that I can do to temporarily fix the leak until I have the time to pull the transfer case and properly seal it? :mechanic:
  2. sno commander

    sno commander PlowSite.com Addict
    from ct
    Messages: 1,063

    that seal to connect the 2 is just to keep crap out. probably your input seal on the transfer case or the output seal on the trans.
  3. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

  4. SharpBlades

    SharpBlades Senior Member
    Messages: 366

    do you think that cleaning it up and using high temp rtv would get it through the winter?
  5. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

    Maybe. Use some brake clean and a brush. Nice and clean and some Permatex Ultra Black.
  6. kashman

    kashman PlowSite.com Addict
    Messages: 1,070

    if its the blue stuff its the wrong stuff black or copper is the right stuff blue dosnt hold up to trans fluid
  7. Rc2505

    Rc2505 PlowSite.com Addict
    Messages: 1,245

    The problem is there is no tranny fluid that is supposed to be in that area. So you have a input or rear seal leaking. So even if you get it to seal up, it's going to be a very short term fix. I'm thinking along the lines of 2 to 4 weeks at best. Once that chamber fills up for the input shaft, or the rear seal leaking, it will eventually eat through whatever you get to seal, and then you will have a big puddle instead of a few drops. Best bet is to tear it down, and fix the problem instead of trying to put a band-aid on it now. Imagine being in a customers driveway, or lot when it lets go, and ends up staining the pavement.
  8. gd8boltman

    gd8boltman Senior Member
    Messages: 328

    A few hours now

    will save more later. Pull the transfer case and replace the front seal and rear seal in the trans and your good to go.

    take care,
  9. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    There is no output seal in the rear of the trans, fluid can and does migrate from the trans into the T-case adapter, thus if the gasket between it and the T-case isn't sealed well you end up with an ATF leak... because it's the gaskets job to keep any ATF in the adapter from leaking out.
  10. MickiRig1

    MickiRig1 PlowSite Veteran
    Messages: 3,617

    Long time no see B&B.
  11. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Here every day Micki. Getting pretty deep into the busy season though so time must be regulated. payup :drinkup:
  12. SharpBlades

    SharpBlades Senior Member
    Messages: 366

    thanks for the input guys :waving:
  13. elite1msmith

    elite1msmith 2000 Club Member
    from chicago
    Messages: 2,762

    I'm always amazed at b&b. Way too much knowledge. Glad he was on our side during ww2