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Thread: Difficulty Shifting

  1. #1
    Gear Grinder
    First Name
    Nat
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    1949
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    Apr 2018
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    Difficulty Shifting

    Hello All, I wonder if anyone might be able to help with a tranny issue I've been having.

    Last summer I started having a hard time shifting into third gear. It is only hard after the T-90 warms up. It doesn't grind. It just doesn't want to go. I rebuilt the tranny three years ago and it ran fine after. Now, not so much. I can hear the throughout bearing vibrating a bit so I know it needs replacing. It shifts fine if I double clutch. I tried adjusting the clutch release cable to no avail. The shift forks don't look worn. I'm not sure what to check next.

    I pulled the tranny and t-case and I'm ready to get after it. The rig is a '49 cj3a. the drive train is mostly stock. It does have a Warn overdrive.

    Any thoughts?

  2. #2
    Well-Oiled mathman's Avatar
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    David
    Year
    1950 1964
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    Pickup Other
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    David,
    1950 $WD Pickup: There is no apostrophe in Willys...

  3. #3
    Well-Oiled
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    Greg
    Year
    1963
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    Wagon
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    Oct 2011
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    For starters Nat I bet it isn't the throw out bearing depending on WHEN it rattles. More likely it's the front bearing. And i think your problem may be clutch linkage. If it was your synchro then it would grind,
    diggerG

  4. #4
    Gear Grinder
    First Name
    Nat
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    1949
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    David,
    Thanks for the link. I used the same guide when I rebuilt the tranny a few years ago. Yesterday I printed a copy to keep in the garage.

    Greg,
    When I release the clutch it makes a winding noise like a lawnmower with a bad recoil bearing. It sounds as if the bearing continues to spin (still engaged) after the clutch is released. I have pulled the throw out bearing and it is worn. You're right about the synchros causing grinding. With a complete rebuild a couple thousand miles ago I'd be surprised if the front bearing is bad. I suppose I could pull the bearing and check it easy enough.

    If it's a clutch or a linkage issue wouldn't it affect shifting into all gears not just third? Anyone know of a good linkage adjustment tutorial?

    I'm going to replace the throw out bearing and check the front bearing. I'll put it all back together and adjust the linkage as well as I can.

    Thanks for the help.

  5. #5
    Well-Oiled
    First Name
    Greg
    Year
    1963
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    Wagon
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    Maybe your synchro blocking rings are jammed up on 3rd only. Check that. and you may have a defective new front bearing.
    diggerG

  6. #6
    Bigger Hammer
    First Name
    Curt
    Year
    1962
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    Wagon
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    Oct 2017
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    I agree with the synchro blocking rings. When you get take the synchro apart you'll find your problem for sure. Good luck

  7. #7
    Bigger Hammer
    First Name
    Jason
    Year
    1948
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    Sep 2017
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    Georgetown Ontario
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    What oil did you put in it? Some of the modern lubes are known to damage brass syncros

  8. #8
    Gear Grinder
    First Name
    Nat
    Year
    1949
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    Apr 2018
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    Saint Paul, MN
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    After rebuilding the tranny, I think the issue was the sliding clutch not moving smoothly over the synchro hub. The synchro hub felt a little rough when I removed it.

    The synchro blocking rings were fine. If they were binding there would have been grinding.

    I replaced the synchro hub assembly along with everything else that should be replaced for a rebuild. All is well.

    pav1 I use a non-hypoid tranny fluid from Lucas Oil. Can't remember the name of the stuff right off.

  9. #9
    Bigger Hammer
    First Name
    Jason
    Year
    1948
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    Sep 2017
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    Georgetown Ontario
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    I found out that most of the manufactures have changed their formulas for the gl5's.

    Apparently most are safe for yellow metals except lucas and royal purple.

    I've done a ton of reading on this.....and here is a great read.

    https://www.lastgreatroadtrip.com/wp...comparison.pdf

  10. #10
    Sharpest-Tool
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