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Leave F134 Engine In Place While Removing Tranny/transfer Case

Discussion in 'Early CJ5 and CJ6 Tech' started by Tom Stephens, Jun 23, 2019.

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  1. Tom Stephens

    Tom Stephens New Member

    I have leaks under my motor, tranny and/or transfer case. After a run, the leaks add up to perhaps a teaspoon of oil. Next thing I read is I should ensure all the pan bolts, etc. are tight. If I can't stop the engine leaks, I want to pull the motor to rebuild while I'm at it.

    My question is this... after I put the motor back in the Jeep, if I find that the tranny and/or transfer case still leak, is it possible to pull those and repair the leaks while still leaving the motor in the Jeep?

    Tom
     
    Tom Stephens, Jun 23, 2019
    #1
  2. timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Sure. Not difficult.
     
    timgr, Jun 23, 2019
    #2
  3. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Assuming you don't have access to a post lift yup, not fum but can be done.

    Putting it back will be less fun :(.

    Remove the bell housing/engine bolts, or alternatively the four bell housing/tranny bolts & it will balance nicely on the cross member. You will need to support the back of the engine & I'd suggest getting the vehicle up another 4-6 inches & using a transmission adapter on a floor jack.
     
    Howard Eisenhauer, Jun 23, 2019
    #3
  4. Glenn

    Glenn Kinda grumpy old man Staff Member

    Why not save yourself some trouble and pull the whole thing at once. Get the engine rebuilt and do whatever needs to be done to the transmission and t-case while you're at it.
     
    Glenn, Jun 23, 2019
    #4
    70cj5134f, 47v6 and baldjosh like this.
  5. PeteL

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

    A "teaspoon?" Why worry?
     
    PeteL, Jun 23, 2019
    #5
    tcfeet, 70cj5134f and 47v6 like this.
  6. baldjosh

    baldjosh Member

    I started to write the same reply as Glenn...but he beat me to it:madwife:
     
    baldjosh, Jun 23, 2019
    #6
    Glenn likes this.
  7. Focker

    Focker That's a terrible idea...What time? Staff Member

    X2
     
    Focker, Jun 23, 2019
    #7
    47v6 likes this.
  8. Glenn

    Glenn Kinda grumpy old man Staff Member

    :rofl:
     
    Glenn, Jun 23, 2019
    #8
  9. spiderman

    spiderman Member

    I didn't realize that it wasn't supposed to leak ! :D
     
    spiderman, Jun 23, 2019
    #9
    Glenn likes this.
  10. Tom Stephens

    Tom Stephens New Member

    Thanks Tim and Howard!

    Glenn,

    "Why not save yourself some trouble and pull the whole thing at once. Get the engine rebuilt and do whatever needs to be done to the transmission and t-case while you're at it." Good point! I am thinking perhaps the oil dripping from the tranny/transfer case might be coming from the engine. How would I know? So my thought was, do the engine first, then I might find out it was only the engine, so why bother with tackling the tranny, etc.

    Tom
     
    Tom Stephens, Jun 23, 2019
    #10
    Glenn likes this.
  11. Glenn

    Glenn Kinda grumpy old man Staff Member

    If you are thinking the engine might need rebuilding then I'm assuming the clutch, transmission, and t-case haven't had work in a long time also. This is based on what I would do in this instance.
     
    Glenn, Jun 23, 2019
    #11
    73 cj5 likes this.
  12. Glenn

    Glenn Kinda grumpy old man Staff Member

    As far as leaks, as mentioned a teaspoon isn't much. After how many miles are you talking about something leaking? Engine oil is the easiest to monitor, but chances are where it's dripping from means gear oil also.
     
    Glenn, Jun 23, 2019
    #12
  13. Tom Stephens

    Tom Stephens New Member

    Glenn,

    Everything behind the motor is working very well, I hate to mess with it.

    Is there a way to tell the difference between motor and tranny oil?

    Tom
     
    Tom Stephens, Jun 24, 2019
    #13
  14. Rick Whitson

    Rick Whitson Detroit Area 2024 Sponsor 2022 Sponsor

    The Smell is the easiest way to tell, trans dope smells different than motor oil. You can feel the difference too, trans oil is thicker, and sticks to your fingers more than motor oil. Good Luck
     
    Rick Whitson, Jun 24, 2019
    #14
  15. Glenn

    Glenn Kinda grumpy old man Staff Member

    If the leaks aren't bad enough to cause problems then in reality, as others have mentioned doing nothing could be the best idea. Try tightening (slightly) any pan and cover bolts. Engine work would be the last thing you want to do.
     
    Glenn, Jun 24, 2019
    #15
  16. kenb

    kenb Cleverly disguised as a responsible adult

    Have you considered the possibility of it being a rear main seal on the engine? I'm looking at the same issue with mine. From what I can tell that involves going in through the oil pan. So you could try that without removing the engine or transmission.
    My clutch also needs attention however so in my case I think I'll be putting the transmission.
     
    kenb, Jun 24, 2019
    #16
  17. 70cj5134f

    70cj5134f Member

    Just drive it. Mine drips. I don't like it, but it does.
    If I were to pull anything for repair, I'd try to be Sure what was leaking?
    Change your oil, clean bottom of engine as well as u can. Then drive and watch for leaks.
    Clean oil is easier to tell the difference from trans oil. I use 15w 40, and a bottle of STP. Slowed my drip by half. And if my trans is the least bit over full it leaks.
     
    70cj5134f, Jun 24, 2019
    #17
    Lockman likes this.
  18. Greevesman

    Greevesman Member

    It tastes different too.
     
    Greevesman, Jun 24, 2019
    #18
    Rick Whitson likes this.
  19. Tom Stephens

    Tom Stephens New Member

    I guess I'm in for smelling, tasting, and tightening. I'll do all that this weekend and see if I can learn anything :)
     
    Tom Stephens, Jun 25, 2019
    #19
  20. Jrobz23

    Jrobz23 Member

    I get worried when my heeps stop leakin’
     
    Jrobz23, Jun 25, 2019
    #20
    70cj5134f likes this.
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