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Cj5 Will Not Move At Rear

Discussion in 'Early CJ5 and CJ6 Tech' started by Jeremiah miller, Oct 25, 2020.

  1. Jeremiah miller

    Jeremiah miller New Member

    Hey y’all, first post,

    I got a 66 cj5 with a 302 and t-90 with overdrive.
    Slowly putting it together, been made from multiple cj5’s.

    tried to move it the other day, here’s what happens, Gears feel good in tranny, clutch feels good but no movement. It will move with 4x4 engaged. Rear driveshaft rotates even in neural.

    T- case issue? Output shaft? I plan on pulling t-case for inspection, but hoping to get some insight.

    thanks
     
  2. Glenn

    Glenn Kinda grumpy old man Staff Member

    If the driveshaft rotates then there is something wrong in the rear differential. It's common to move a little bit but not a full rotation.
     
    dozerjim and PeteL like this.
  3. PeteL

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

    :shock: That can't be unless the axle/differential is toast.
     
    Glenn and dozerjim like this.
  4. Jeremiah miller

    Jeremiah miller New Member

    Ya full rotation when I push the jeep. But when the jeep is running and I put in gear, driveshaft doesn’t move.
     
  5. Glenn

    Glenn Kinda grumpy old man Staff Member

    Ok, misinterpretation of what you meant. That's normal, and expected, for it to rotate when the vehicle is moving.
     
  6. Glenn

    Glenn Kinda grumpy old man Staff Member

    Something has to be wrong in the transfer case for it to only move with the front axle driven.
     
  7. Jeremiah miller

    Jeremiah miller New Member

    Even in neutral?
     
  8. colojeepguy

    colojeepguy Colorado Springs

    Welcome from up the road in Colorado Springs!
    When you say neutral, do you mean trans in neutral or tcase?
     
  9. Jeremiah miller

    Jeremiah miller New Member

    Trans in neutral
     
  10. Jeremiah miller

    Jeremiah miller New Member

    Looks like with tranny and t-case in neutral the drive shaft still rotates when I push jeep fwd and backwards. But when motets running and transfer case engaged and I put tranny in gear it won’t drive.

    hope that makes since
     
  11. Glenn

    Glenn Kinda grumpy old man Staff Member

    The tires/wheels turn the axle shafts which turn the differential which turns the drive shaft. That's why you see the drive shaft rotate while rolling. Does your transfer case have 2 shift levers?
     
  12. PeteL

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


    Oh. Not what it sounded like at first.

    " transfer case engaged" Are you really sure??? Interference or slop not preventing full lever movement?
     
    Glenn likes this.
  13. Glenn

    Glenn Kinda grumpy old man Staff Member

    My thought too.
     
  14. Jeremiah miller

    Jeremiah miller New Member

    I’m checking now
     
  15. Jeremiah miller

    Jeremiah miller New Member

    So it appears my overdrive was mabie stuck. I pulled the cover in cab to verify t-case was fully ingaging

    started her up put in fwd and it moves, took it out of 4x4 it moves! I don’t have a lever for my overdrive just the 2 for 4x4, I did pull the overdrive shaft out prior to try to move.
     
    Glenn likes this.
  16. Keys5a

    Keys5a Sponsor

    Do you have a transfer case drive gear to replace overdrive bowl gear so you can totally remove/eliminate the O/D from the equation?
    Are you sure the clutch is adjusted/functioning properly?
    -Donny
     
  17. Jeremiah miller

    Jeremiah miller New Member

    I have a Ramsey winch I could put on, I’m gonna attach the overdrive lever. I kinda like having it, once the restore is completed I plan on driving daily.
     
    Glenn likes this.
  18. garage gnome

    garage gnome ECJ5 welder

    There is a "neutral" position on the overdrive. I've had mine do that before.
     
    colojeepguy likes this.
  19. Warloch

    Warloch Did you say Flattie??? Staff Member

    Yup - that can be the issue without the shifter to make sure its IN or OUT... that in between has bitten me while work on them too.