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T90... I Think. Will Not Go Into Reverse.

Discussion in 'Early CJ5 and CJ6 Tech' started by Cowboyjeeper, Apr 17, 2020.

  1. Cowboyjeeper

    Cowboyjeeper Member

    Hey everyone i just picked up a 59 cj5 4cyl runs and stops ok but wont go into reverse. Clutch is fine and not dragging. The stick simply wont move forward to reverse. Ami i missing something? There a lockout lever or cable?

    Search yielded lots of reverselight threads is all.
    Pics coming soon.
     
  2. garage gnome

    garage gnome ECJ5 welder

    It is a straight cut gear. Did you try slipping the clutch to get it to go in?

    There is an arm inside the transmission to slide the reverse idler gear in. It might not be aligned properly in the shift rail. You could take the top off the transmission and take a peek in there.
     
    Cowboyjeeper likes this.
  3. Cowboyjeeper

    Cowboyjeeper Member

    [​IMG]
    Heres pics i promised

    59 cj5
     
  4. Cowboyjeeper

    Cowboyjeeper Member


    Kinda like a sm420? If i had to guess it feels like an alignment thing it wont even move in the slot like it has a lock out
     
  5. garage gnome

    garage gnome ECJ5 welder

    Looks like a T90, but it’s hard to tell. Yes, like an sm420.
     
  6. Cowboyjeeper

    Cowboyjeeper Member

    [​IMG] Update got the top off. It looks as though the rod is in bacwards on the shift top.. Trans had water in it so it will be getting flushed and refilled.
    T90
    Anyone know where to find a manual for this thing.
    This is the most stock ive ever had.

    thanks everyone.
     
    Jeepinjase likes this.
  7. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Considered the gold standard for rebuilding-

    T90 Rebuild Guide

    There's accompanying videos on youtube.

    Do you have a factory service manual?
     
  8. Cowboyjeeper

    Cowboyjeeper Member

    No i do not have a manual. Can one still be had?
     
  9. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

  10. Cowboyjeeper

    Cowboyjeeper Member

  11. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    There's not much for these things that isn't available, some of it is of questionable quality but it's out there.
     
    Glenn and Cowboyjeeper like this.
  12. wheelie

    wheelie beeg dummy 2024 Sponsor 2023 Sponsor

    Water is not uncommon in these things. Drain the transfer case and refill as well. If there's water in the trans, there's most likely water in the transfer case as well. I'd probably do it again after putting some miles on the new fluid and consider the first round to be a flush.

    Things might just work a lot better with new oil in there.
     
  13. garage gnome

    garage gnome ECJ5 welder

    I would put some diesel or heating oil in it and drive around a parking lot. You would not believe the gunk that comes out. I do that every time after I get water in my diffs and transmission.

    Be sure to refill with mineral oil so the yellow metals don't get dissolved by the sulfur in regular gear oil.
     
    Cowboyjeeper likes this.
  14. Cowboyjeeper

    Cowboyjeeper Member

    [​IMG] Refilled with gl4 oil said its for manual trans. Going to run it a short time do your heating oil suggestion
    Then fill with sta-lube from napa.

    Figured out reverse issue someone put the brass fitting too far down and the shift rod wouldnt move. Imgur
     
  15. Alan28

    Alan28 Well-Known Member 2022 Sponsor

    I had water in my 4 gear transmission and it rusted, so I had to pay for new parts (and a pro work). In exchange I had a 5 years warranty ... It still works very well, I like driving my Jeep.(y):clap:
     
  16. Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Why would any body put that kind of fitting in a transmission? Doesn't even relate?
     
    Cowboyjeeper likes this.
  17. Cowboyjeeper

    Cowboyjeeper Member

    I agree haha. But glad it was an easy fix.
     
  18. Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    What do you suppose the PO was attempting to do with that fitting?
     
  19. wheelie

    wheelie beeg dummy 2024 Sponsor 2023 Sponsor

    I like it when it's an easy fix. Good deal.
     
  20. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Fording system? Stupid place to put it if so. o_O
     
    Walt Couch likes this.