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  1. #1
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    Default Jeep XJ 4.0 Rear main seal

    Hi guys.
    Im going to change the sump gasket on my Xj as it is leaking badly, the valve cover gasket also has a leak, and will also be replaced as soon as it arrives. So my idea is to change the valve cover gasket, clean everything up and see if there is oil coming from above the sump and so determining if the rear main is leaking. Should i replace it even if it is ok or should i just leave it be and worry about it if it starts leaking?
    Thanx in advance
    '96 Jeep XJ 4.0 "die blou monster" work in progress
    ex: 2000 Kia sportage 2.0
    ex: 2005 Ford Ranger D/C XLT 4.0 Auto

  2. #2
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    Default Re: Jeep XJ 4.0 Rear main seal

    Quote Originally Posted by johan76 View Post
    Hi guys.
    Im going to change the sump gasket on my Xj as it is leaking badly, the valve cover gasket also has a leak, and will also be replaced as soon as it arrives. So my idea is to change the valve cover gasket, clean everything up and see if there is oil coming from above the sump and so determining if the rear main is leaking. Should i replace it even if it is ok or should i just leave it be and worry about it if it starts leaking?
    Thanx in advance
    I would replace it while the sump is off, itís really worth the extra bit of trouble and they are cheap. Does yours have a 2 piece seal? If yes buy a few seals because they are easy to tear when installing. Sunlightís Soap, and oil should prevent this from happening
    1985 Toyota Fj45 Landcruiser 4.2 P/U (Sold),
    1991 Jeep Wrangler YJ 4.0 Sport (Sold),
    2006 Toyota Hilux 3.0 D4D D/C Raider (Sold),
    1984 Suzuki Sj410 1.0,(Sold)
    1991 Jeep Wrangler YJ 4.0 Renegade
    2007 Jeep Wrangler JKU 3.8 Sahara
    2014 Jeep WK2 3.6 Overland

  3. #3
    Join Date
    Jul 2008
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    Default Re: Jeep XJ 4.0 Rear main seal

    I've heard that once they start leaking the leak tends to come back even after putting the new seal in. But I have no experience with it myself.


    Mine leaks but it's not really noticeable unless the Jeep stands for long, like 2 weeks or so. If you drive it every few days the oil just keeps the outside of the Gearbox free from corrosion
    Stu.
    Current:
    06 Wrangler Sahara. 3.5inch Rubicon Express and Bilstein lift, Metalcloak control arms, 1.25" RC Body Lift, 1" JKS MotorMount Lift, Zone Disconnects, BFG KM2 33's
    NO LOCKER NEEDED!!!
    KTM 1190 Adventure

  4. #4
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    Default Re: Jeep XJ 4.0 Rear main seal

    Where can I get the seal? American Suv wants something in the line of R400 for one. Mine is the two piece.
    '96 Jeep XJ 4.0 "die blou monster" work in progress
    ex: 2000 Kia sportage 2.0
    ex: 2005 Ford Ranger D/C XLT 4.0 Auto

  5. #5
    Join Date
    Oct 2010
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    Pretoria
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    Default Re: Jeep XJ 4.0 Rear main seal

    Sorry I didnít see you message, aaonline have them for less than 200
    1985 Toyota Fj45 Landcruiser 4.2 P/U (Sold),
    1991 Jeep Wrangler YJ 4.0 Sport (Sold),
    2006 Toyota Hilux 3.0 D4D D/C Raider (Sold),
    1984 Suzuki Sj410 1.0,(Sold)
    1991 Jeep Wrangler YJ 4.0 Renegade
    2007 Jeep Wrangler JKU 3.8 Sahara
    2014 Jeep WK2 3.6 Overland

  6. The Following User Says Thank You to backmarker For This Useful Post:


  7. #6
    Join Date
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    Pretoria
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    Thanked: 15

    Default Re: Jeep XJ 4.0 Rear main seal

    Quote Originally Posted by backmarker View Post
    Sorry I didnít see you message, aaonline have them for less than 200
    Thanx, will have a look on their website
    '96 Jeep XJ 4.0 "die blou monster" work in progress
    ex: 2000 Kia sportage 2.0
    ex: 2005 Ford Ranger D/C XLT 4.0 Auto

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