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Scratchin' my head... at a complete loss

Discussion in 'Early CJ5 and CJ6 Tech' started by russo, Dec 16, 2012.

  1. Dec 16, 2012
    russo

    russo Hope is not a method

    Norris, Tennessee
    Joined:
    Oct 28, 2005
    Messages:
    498
    Yesterday the '5 made a pop while accelerating and quit on me about a half mile from the house. I coasted her to the shoulder and tried to restart her. Nothin' doing. The better half brought my truck down, and I flat towed the '5 home ( trans and xfer in neutral).

    Tested the coil at home and it tested bad. Replaced it and the jeep fired right up. Dropped her off the tow bar to put her in the garage only to find she would not motivate. The xfer case seems fine, and it seems to go into all positions. The trans seems to work through the gears, but when I place it in gear, there is no resistance. She rolls just as if she were in neutral.

    I pulled the trans cover and there is no obvious damage.

    Anyone have an idea where to start trouble shooting this one?
     
  2. Dec 16, 2012
    Dummy

    Dummy I kick hippies

    Escondido, CA
    Joined:
    Dec 5, 2004
    Messages:
    647
    Tranny in gear, T-case in Neutral for flat-towing. Good thing you kept it short.

    Start simple. Check for spark, then fuel, then valvetrain (air).
     
  3. Dec 16, 2012
    russo

    russo Hope is not a method

    Norris, Tennessee
    Joined:
    Oct 28, 2005
    Messages:
    498
    She runs no problem - she will just not motivate.

    According to the 1969 owner's manual both trans and xfer are to be in neutral for towing (page 32).
     
  4. Dec 16, 2012
    chuck123wapati

    chuck123wapati Member

    wyoming
    Joined:
    Jun 18, 2008
    Messages:
    761
    maybe your slip yoke failed put it in gear and look underneath to see if its turning
     
  5. Dec 16, 2012
    PeteL

    PeteL Member 2020 Sponsor 2019 Sponsor

    Hills of NH
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    Aug 3, 2003
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    6,695
    Tried it in 4-wheel drive? If it works, then your trouble is in the rear end. Otherwise i would double-double check that the transfer case shift lever and linkage is truly putting it in drive.
     
  6. Dec 16, 2012
    68BuickV6

    68BuickV6 Well-Known Member

    Chino, CA.
    Joined:
    Mar 12, 2012
    Messages:
    2,016
    Just trust us on this, based on experience, nearly cooked my trans on the way to Calico doing that.
    Lets skip a flat towing discussion here.:dead horse:


    Are the driveshafts turning?
     
  7. Dec 16, 2012
    russo

    russo Hope is not a method

    Norris, Tennessee
    Joined:
    Oct 28, 2005
    Messages:
    498
    The drive shafts are not turning in 2H, 4H or 4L, however the transfer does engage.
     
  8. Dec 16, 2012
    WorkInProgress

    WorkInProgress Member

    Kennewick, Wa
    Joined:
    Jul 15, 2012
    Messages:
    946
    input shaft stripped on transmission?
     
  9. Dec 16, 2012
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    9,482
    Single lever t-case shifter? Any chance the shifter linkage is messed up? Output gear come off of the transmission? Any kind of weird noise when it quit running?
     
  10. Dec 16, 2012
    w3srl

    w3srl Semi-homeless in Florida Staff Member

    Port Orange, FL
    Joined:
    Nov 6, 2002
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    3,959
    I was going to mention pulling the cover on the back of the TC to see if the bull gear is still on the shaft.
     
  11. Dec 16, 2012
    A Mandery

    A Mandery Member

    Indianapolis,...
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    Dec 2, 2003
    Messages:
    138
    Can you feel any difference in the vibation transmitted through the shifter cane when the motor is running and clutch is depressed and released? Assuming has floor shifter.
     
  12. Dec 16, 2012
    chuck123wapati

    chuck123wapati Member

    wyoming
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    Jun 18, 2008
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    761
    yup and then the top of the tranny
     
  13. Dec 16, 2012
    curtcanada

    curtcanada L, L, and the POH!

    Western Slope, CO
    Joined:
    Nov 25, 2008
    Messages:
    372
    X3 on the gear coming off the output shaft, in the transfer case.
     
  14. Dec 16, 2012
    russo

    russo Hope is not a method

    Norris, Tennessee
    Joined:
    Oct 28, 2005
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    498
    The xfer shift linkage was what I checked first. It is a single lever. The "pivot bar" (not sure what to call it) was disconnected on one end. I reconnected, and the xfer case seems to shift normally.

    My next step I guess is to pull the plate on the xfer case and check the output gear. That will have to wait until next weekend. I did not know those would come off without some help. No noise when it quit running other than a small pop as I was topping a hill under acceleration. It popped once; the engine died and would not restart until I replaced the ignition coil.
     
    Last edited: Dec 16, 2012
  15. Dec 16, 2012
    russo

    russo Hope is not a method

    Norris, Tennessee
    Joined:
    Oct 28, 2005
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    498
    No unusual vibration. Trans seems normal, and when I pulled the top cover it looked normal as well.
     
  16. Dec 16, 2012
    duffer

    duffer Rodent Power 2019 Sponsor

    Bozeman, MT
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    Hard to believe the coil issue had anything to do with the apparent gap in the drivetrain. I don't think this should be that complicated. I would look at the tcase linkage again and have someone else shift it while you watch to see if the shift rods are both moving correctly. The main drive gear could have come off but I'm not sure there is enough space for it to get clear off without hitting the cover which should make some noise.
     
  17. Dec 16, 2012
    kamel

    kamel Senior Curmudgeon

    Erlanger, Kentucky
    Joined:
    Jun 10, 2003
    Messages:
    892
    YOu could remove the inspection plate on the top of the bell housing. At that point you can see if the clutch is engaging the main drive gear or not. It probably is...

    YOu could remove the rear plate on the xfer case and see if it the input gear to xfer is turning. You could put a chalk mark on the bull gear and hit the starter without starting the jeep. You could then crawl under the jeep and see if the chalk mark moved.

    If you think that the xfer case is bad, I'd look for xfer shifting problems before I took anything apart. If the xfer was somehow "stuck" in neutral you'd have exactly the problem you describe.

    Now, if you have an overdrive you could have cooked the planetary gears during the tow.

    good luck
     
  18. Dec 16, 2012
    russo

    russo Hope is not a method

    Norris, Tennessee
    Joined:
    Oct 28, 2005
    Messages:
    498
    That was my thought about the coil too. Just an unhappy coincidence.

    I pulled the floor pans today so I could see all of the linkages on the xfer from up top. They appear to be working properly.
     
  19. Dec 16, 2012
    Dummy

    Dummy I kick hippies

    Escondido, CA
    Joined:
    Dec 5, 2004
    Messages:
    647
    Pull the five bolts that hold the PTO cover on the back of the Spicer 18 and put the drive gear back in place if the teeth/splines aren't damaged. There is room for it to come back just enough to put the gears out of mesh so you can row without any grinding sound.

    Often happens when somebody has assembled it without using a nylock or red Loctite to hold the mainshaft nut on.
     
  20. Dec 16, 2012
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    9,482
    Since you said part of the linkage was disconnected I think I would focus on whether the low range rod is moving, or moving enough. Could very well be it's stuck in neutral. ;)
     

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