Thread: Tranny Leaking

  1. #1
    djfred's Avatar
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    Lightbulb Tranny Leaking

    Hey guys whats up

    I have a question.
    I was wondering if you guys would know of any quick and easy
    fix that i myself can do.

    Problem is my tranny is leaking oil, when i drive up and park i can notice it leaking couple of drops by the morning the puddle of oil is about 2 inch big.
    its not a lot but in the long run it is.
    Wondering without taking it to the Transmission guy that i know, to have him fix it for $250, you guys know any quick fixes that i can do until i take it to him when i get the time.


    thank you
    --Now--
    White 1992 YJ -- 4" Lift -- Tires 35x12.50x15 -- Magnaflow Exhaust & Cat -- K&N Air Filter -- Sanden OBA -- Dual Snorkel (Coming Soon)
    --Future Mod--
    Front D30 (4.88 w/ Powertrax No-Slip) -- Rear 8.8 (4.88 w/ ARB) -- Front Custom Bumper -- Custom Side Rock Guards

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    currupt4130's Avatar
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    Re: Tranny Leaking

    You're gonna have to get under and tell us where it's leaking from and if it's an auto or manual
    06 VW (hardcore crawler)

    "The mountains are calling and I must go." -John Muir

  3. #3
    djfred's Avatar
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    Re: Tranny Leaking

    Its manual Tranny
    here are some pics i just snapped away



    After 4 Weeks of having the car this is what the Cardboard looks like.





    --Now--
    White 1992 YJ -- 4" Lift -- Tires 35x12.50x15 -- Magnaflow Exhaust & Cat -- K&N Air Filter -- Sanden OBA -- Dual Snorkel (Coming Soon)
    --Future Mod--
    Front D30 (4.88 w/ Powertrax No-Slip) -- Rear 8.8 (4.88 w/ ARB) -- Front Custom Bumper -- Custom Side Rock Guards

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    lah2420's Avatar
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    Re: Tranny Leaking

    If you're sure it's the tranny, it is probably coming from the input seal. You have to drop the tranny to fix.
    If you're not sure it's the tranny, it could be the valve cover, leak around the oil pressure sensor, leak around the oil filter, or possibly even rear main seal. I would check everything else before dropping the tranny. I'm guessing valve cover. Remember that it's blowing back as you drive it.

  5. #5
    djfred's Avatar
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    Re: Tranny Leaking

    ill give those things a check in a little bit. ima clean up the tranny from grease then see where the leak is from

    thank you
    --Now--
    White 1992 YJ -- 4" Lift -- Tires 35x12.50x15 -- Magnaflow Exhaust & Cat -- K&N Air Filter -- Sanden OBA -- Dual Snorkel (Coming Soon)
    --Future Mod--
    Front D30 (4.88 w/ Powertrax No-Slip) -- Rear 8.8 (4.88 w/ ARB) -- Front Custom Bumper -- Custom Side Rock Guards

  6. #6
    Bounty__Hunter's Avatar
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    Re: Tranny Leaking

    Looks like the rear main seal. Good chance your CCV system is clogged and you're building too much crankcase pressure, not properly venting it to the intake.

  7. #7
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    Re: Tranny Leaking

    Gotta agree with Bounty. From the oil build-up on the oil pan (way up above the drain), looks like it's been seeping from above, then as you drive, blowing over everything else. I would suggest a good cleaning of all that residue, then a prudent check after driving a little while............might shed a little more light on the problem. Good luck!
    Just Enjoy Every Possibility!

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    Re: Tranny Leaking

    Yeah - I'm with the other guys here. Clean off the gunk until you get to the highest point of the leak... my guess is it's leaking back from the valve cover, or it's the rear main. Should be easy to see which when you scrub it down (or, should I say up... work from the lowest point upwards).
    Because... when you overcome that obstacle, it just feels Rompalicious.

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    Re: Tranny Leaking

    Quote Originally Posted by Bounty__Hunter View Post
    Looks like the rear main seal. Good chance your CCV system is clogged and you're building too much crankcase pressure, not properly venting it to the intake.
    Mhmmm
    06 VW (hardcore crawler)

    "The mountains are calling and I must go." -John Muir

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    Re: Tranny Leaking

    I had a similar problem in my '93 YJ. After replacing the valve cover gasket and cleaning out the CCV lines and elbow fittings, the engine oil blow-by into the air filter stopped, as did the oil drips onto the ground. When you go to the store for a replacement gasket, make sure it's the right one. Some kid at AutoZone tried to give me a 4 cylinder valve cover gasket when I needed a 6. Good thing I took the gasket out of the box before leaving the counter.

    '93 YJ, 6 cyl., 5 speed brought back to life over a period of a few months.
    Check out the restoration write-up of Project Salt (Pictures for May-August to come!)

  11. #11
    Bounty__Hunter's Avatar
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    Re: Tranny Leaking

    To check for a clogged CCV system, find the tube connecting the rear of the valve cover with the airbox. Remove it at the airbox end and it should be sucking air into the engine with the jeep running. If it's blowing air out, your CCV is likely clogged. The clog is usually in the small line connecting the valve cover with the intake manifold. The line could be broken or the inline restriction orifice is clogged and needs cleaned.

  12. #12
    djfred's Avatar
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    Re: Tranny Leaking

    thank you guys all this information is awesome

    you guys rock
    --Now--
    White 1992 YJ -- 4" Lift -- Tires 35x12.50x15 -- Magnaflow Exhaust & Cat -- K&N Air Filter -- Sanden OBA -- Dual Snorkel (Coming Soon)
    --Future Mod--
    Front D30 (4.88 w/ Powertrax No-Slip) -- Rear 8.8 (4.88 w/ ARB) -- Front Custom Bumper -- Custom Side Rock Guards

  13. #13
    Dry suit diver's Avatar
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    Re: Tranny Leaking

    I have a similar sort of leak except there is no 'blow by' on the sump, it seems to be just over the tranny and everything rearwards, more to the right side of the vehicle (opposite side to the transfer case). any thoughts on the problem. I havent tried the CCV cleaning yet so am hoping that might be it.

    is the rear main seal easy to change on a I6 4ltr?
    some are born weird , others have weirdness thrust upon them

  14. #14
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    Re: Tranny Leaking

    I did mine in about 5 hours. You don't have to unbolt the exhaust or the engine mounts like the service manual calls for.

    I just jacked it up on the frame until I had enough clearance to pull the pan.

  15. #15
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    Re: Tranny Leaking

    Quote Originally Posted by shvlhd666 View Post
    I did mine in about 5 hours. You don't have to unbolt the exhaust or the engine mounts like the service manual calls for.

    I just jacked it up on the frame until I had enough clearance to pull the pan.
    its going into the shop then, no covered workspace here so I would be at the mercy of the british weather, bit of luck it might be the CCV overpressuring the motor or a leaky rockerbox gasket.
    some are born weird , others have weirdness thrust upon them

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