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under water

Discussion in 'Early CJ5 and CJ6 Tech' started by bob m, Dec 12, 2010.

  1. Dec 12, 2010
    bob m

    bob m Member

    miami, fl
    Joined:
    Oct 5, 2010
    Messages:
    88
    on inspection of the gear lube in the 3 speed trans I found evidence of water in the gunk that had settled by the drain port. How can I flush the tranny without doing damage to the seals. I was considering flushing with mineral spirits then installing new oil and running it around the block and changing it one more time. With my fiberglass tub I don't think i can remove the top shifter cover very easy to use brake cleaner as mentioned eleswhere.
     
    Last edited: Dec 12, 2010
  2. Dec 12, 2010
    69Rustj5

    69Rustj5 :)

    Logan, Ut.
    Joined:
    Sep 4, 2008
    Messages:
    55
    I have used ATF to clean an engine with stuck lifters before. i don't see why it wouldnt help clean your 3 speed. add half a quart with some good gear lube and run it for a few miles. then change it out again. it is high in detergents to keep the valves in an automatic clean enough to function.
     
  3. Dec 12, 2010
    Steve's 70-5

    Steve's 70-5 Active Member

    Louisville, Ky
    Joined:
    Nov 12, 2009
    Messages:
    1,381
    Pull the plug and drain it. leave the plug out for a day or two. Fill the trans, drive and drain. Drain it as soon as you finish driving everything will be mixed up. Do this a few times

    Steve
     
  4. Dec 12, 2010
    farm'n Mike

    farm'n Mike New Member

    South Valley, Oregon
    Joined:
    Feb 19, 2010
    Messages:
    12
    I've used diesel fuel to flush boxes. Drain contaminated oil out, fill to the proper level or slightly higher and run a few miles then drain. I usually let it drain for 20-30 minutes then refill with the proper oil. Never had any problems with the seals leaking.
     
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