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Best Way To Free Up Rusted Trans Gearing

Discussion in 'Builds and Fabricators Forum' started by jb3b, Aug 1, 2020.

  1. Aug 1, 2020
    jb3b

    jb3b New Member

    south jersey
    Joined:
    Jun 19, 2020
    Messages:
    13
    I've finally pulled the tub off my 54 3b and before pulling trans would like to have everything freed up.The rear,front diff,transfer case,e brake all spin.It wouldn't go into gear so I pulled the shift tower and was able to get it moving but the gearing is locked up.I think water got in thru the tower before I bought it,there was surface rust on gears..I've been pouring trans fluid on it.I'm planning to drain it, fill to brim with used motor oil and leave it sit for a few days.Can I very gently tap gears with plastic block with out screwing it up and does anybody have any suggestions ?Thanks in advance
     
  2. Aug 1, 2020
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    cordele, Ga.
    Joined:
    Mar 29, 2007
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    5,916
    If it is the T-90 then you probably best to get another one that is not rusted. There is lots of them out there and not real expensive. The tranny shares it's lube with the transfer case so you need to drop the pan on the transfer and have a look see.
     
  3. Aug 1, 2020
    jb3b

    jb3b New Member

    south jersey
    Joined:
    Jun 19, 2020
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    13
    Yes it's a T-90
     
  4. Aug 1, 2020
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    Sep 23, 2002
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    12,529
    I agree with Walt Couch. If it’s rusted bad enough to lock up there probably won’t be much that is any good anyway.
     
  5. Aug 1, 2020
    jb3b

    jb3b New Member

    south jersey
    Joined:
    Jun 19, 2020
    Messages:
    13
    Could be the reason last tag was 1975.At least its in neutral.What about a rebuild kit and do you think its seized in the case ?
     
  6. Aug 6, 2020
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
    Joined:
    Mar 4, 2003
    Messages:
    5,466
    You could tear it apart and see where it's frozen. Bearings top and bottom are the first place if it's been sitting in water. The case can usually be cleaned up and used, you will just need to check the gears and clusters on them.
     
  7. Aug 6, 2020
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    Aug 3, 2003
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    If it has been outdoors without a roof this will happen.
     
  8. Aug 7, 2020
    jb3b

    jb3b New Member

    south jersey
    Joined:
    Jun 19, 2020
    Messages:
    13
    I drained both trans and transfer case .Water than sludgy fluid but no metal chips.Looks like a rebuild this winter.
     
  9. Aug 7, 2020
    Keys5a

    Keys5a Sponsor

    Florida Keys
    Joined:
    Jan 23, 2014
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    4,170
    Gear oil floats on the water, in other words, the cluster gear was sitting in water, just how deep? Also, was the water deep enough to flow into the transfer case?
    Only a teardown and evaluation will tell what you have to work with.
    I have a Jeep I bought that had a pyramid of goo on the ground under it. The transmission and transfer case were both entirely filled with rainwater, and all the gear oil flowed out the vent, slowly dripping the gear oil to form the pyramid below. The water was perfectly clear when I pulled the shift tower off. I could clearly see the cluster gear at the bottom. I would have expected orange rust-water.
    -Donny
     
  10. Aug 7, 2020
    jb3b

    jb3b New Member

    south jersey
    Joined:
    Jun 19, 2020
    Messages:
    13
    When I pulled the tower off and saw the rust I expected some water and yes it came out crystal clear.Petro products float on water,knowing this can get you out the woods if you drown your vehicle.If you let it sit they will separate.
     
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