1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

D18 Front Output Shaft

Discussion in 'Early CJ5 and CJ6 Tech' started by matthew johnson, Jul 14, 2016.

  1. Jul 14, 2016
    matthew johnson

    matthew johnson Major League Infidel

    northern california
    Joined:
    Feb 11, 2008
    Messages:
    139
    Good day to you all, I have a 66 with the 225, SM 420, D18 with Warn OD and lost 4WD. So before tearing into the D27 I pulled the drive line and noticed that the front output shaft on the transfer case spins by hand while in 4WD. Is that a broken output shaft?
     
  2. Jul 14, 2016
    ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

    Spokane Valley, WA
    Joined:
    Aug 13, 2015
    Messages:
    6,686
    I'd pull the t-case pan and see what's going on. It could be something as simple as a broken shift fork, or maybe the set screw came loose and the fork is sliding on the shaft.

    If something did break, you'll still want to pull the pan to get any pieces out before you drive it any more.
     
  3. Jul 14, 2016
    Keys5a

    Keys5a Sponsor

    Florida Keys
    Joined:
    Jan 23, 2014
    Messages:
    4,192
    Are you running a twin-stick or single-lever T/C? I have seen a single-lever where the "pill" is removed (or jammed) so that the 2/4wd shift rail doesn't move, but the high/low rail functions.
    See if both shift rails operate via the appropriate lever.
    -Donny
     
  4. Jul 14, 2016
    Twin2

    Twin2 not him 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Virginia Beach, VA
    Joined:
    Apr 28, 2011
    Messages:
    5,421
    I would think it's the 4WD fork has come off . only the front housing has to come off to check
     
  5. Jul 14, 2016
    matthew johnson

    matthew johnson Major League Infidel

    northern california
    Joined:
    Feb 11, 2008
    Messages:
    139
    Thank you all for the advice, I will pull the cover this weekend and see what I can see.
     
  6. Jul 14, 2016
    matthew johnson

    matthew johnson Major League Infidel

    northern california
    Joined:
    Feb 11, 2008
    Messages:
    139
    Got ambitious and pulled the cover, there was very fine metal, but it looks like normal wear to me. But here is where I get lost, while moving the overdrive lever and 2&4 WD lever I check the front output shaft and it's locked in 4WD, but it only happens when I take it out of overdrive into low range regardless if it's in 2wd or 4wd. I know I'm not the smartest guy, but I don't get it. Why would that happen?
     
  7. Jul 14, 2016
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,378
    I'm not quite sure I understand your description of what you did. The Warn OD should not have anything to do with the 4WD function. The 2 & 4 WD lever should be the only thing that would affect the front output shaft engagement. Low and high range is just that, no more.

    If you have OD, you have 4 shift levers.....left to right....transmission, OD, 2 & 4 WD, low and high range.
     
  8. Jul 14, 2016
    matthew johnson

    matthew johnson Major League Infidel

    northern california
    Joined:
    Feb 11, 2008
    Messages:
    139
    I know OD shouldn't have any affect on 4WD, but it does and that's why I'm scratching my head. And it only has three shifting levers. Left to right, transmission, 2 & 4wd then low/high range.
     
  9. Jul 14, 2016
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,378
    How do you shift to OD and back without a shift lever?
     
  10. Jul 14, 2016
    matthew johnson

    matthew johnson Major League Infidel

    northern california
    Joined:
    Feb 11, 2008
    Messages:
    139
    It isn't a twin stick, the middle lever operates both 2 and 4WD. My apologies for any confusion.
     
  11. Jul 14, 2016
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,378
    My bad, I automatically assumed twin stick t-case since that's all I have. The single lever linkage might be your problem then. When they wear it makes for sloppy shifting and non engagement issues. I still don't see how OD could affect anything.
     
  12. Jul 14, 2016
    matthew johnson

    matthew johnson Major League Infidel

    northern california
    Joined:
    Feb 11, 2008
    Messages:
    139
    I don't see how either:) I'll keep playing with it because it's probably something simple and right in front of my face, but either way, the body is coming of this winter to fix some cracks, rebuild the transmission, paint the frame etc, so I'll be able to get it delt with then. But in the mean time, hunting season and harvest are fast approaching so it will have to wait.
     
  13. Jul 14, 2016
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,378
    Yeah, it should be a fairly easy fix. You would be wise to check that linkage out though, you don't want it to fail on you and leave you stranded or end up laying under it at the worst time trying to get it to shift. ;)
     
    Keys5a likes this.
  14. Jul 14, 2016
    matthew johnson

    matthew johnson Major League Infidel

    northern california
    Joined:
    Feb 11, 2008
    Messages:
    139
    Will do Mr. Glenn(y)
     
  15. Jul 14, 2016
    Daryl

    Daryl Sponsor

    Bonney Lake, WA
    Joined:
    May 25, 2006
    Messages:
    2,882
    Sometimes it is as easy as replacing the 5/16" clevis pins that wear. You can also sometimes add a flat washer between the shift linkage and the cotter pin to tighten them up. Just lay underneath and have so one slowly move the linkage to see where the slop is at.
     
  16. Jul 15, 2016
    ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

    Spokane Valley, WA
    Joined:
    Aug 13, 2015
    Messages:
    6,686
    I'm still confused. Are you saying the middle shifter operates in 2 and 4wd? Or are you saying the middle shifter switches your jeep from 2 to 4wd?

    Is it possible you do have a twin-stick t-case and you're mistaking the middle shifter for an OD shifter?

    I'm not trying to insult, just trying to work with the info you're giving us.
     
  17. Jul 15, 2016
    ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

    Spokane Valley, WA
    Joined:
    Aug 13, 2015
    Messages:
    6,686
    Just to be clear, look under your jeep. Does the back of the transfer case look like this? Maybe you have the OD unit but are missing the shifter?

    [​IMG]
     
  18. Jul 15, 2016
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,378
    Same here, I'm still a bit confused too. I had twin stick in my mind but I assume that since it's a V6 it does have the single lever case. We definitely need a picture of his setup. ;)
     
    ITLKSEZ likes this.
  19. Jul 15, 2016
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
    Joined:
    Mar 4, 2003
    Messages:
    5,470
    There is NO WAY the OD can cause an issue with just the front axle engagement. It works off the bull gear into the Tcase and if its having a problem, the whole drive system is having a problem, not just the front.
     
  20. Jul 15, 2016
    matthew johnson

    matthew johnson Major League Infidel

    northern california
    Joined:
    Feb 11, 2008
    Messages:
    139
    What a hornets nest huh?:D The middle shift lever switches from 2 to 4wd, the shifter on the right operates high and low. I'll get pictures of the shifters and underneath after work and I'm certainly not insulted, you guys are just trying to help and I appreciate it(y)

    Just to be clear, there are only two shifters for the transfer case, when I say three shifters I'm including the transmission shifter.
     
    Last edited: Jul 15, 2016
New Posts