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yj Shifting issues

Discussion in 'Quitters' Club' started by heffleysmill, Jun 24, 2015.

  1. Jun 24, 2015
    heffleysmill

    heffleysmill 7 Slot Hotshot

    Columbus,TX
    Joined:
    Jun 4, 2010
    Messages:
    152
    I recently acquired a 94 4cyl 5sp yj Wrangler. The issue I was told from original owner is when starting it, it must be in gear or trans will not go into gear. Starting with transmission in gear, all is well, shifts fine and drives great with no clutch slippage. Once you put shifter in neutral and release the clutch, you can no longer put back in gear unless you turn off ignition, place back in gear and start it again.

    my thoughts.... hydraulic clutch but then again maybe synchronizers, but it shifts too well once you get it in gear. I don't think the clutch itself would be the issue, being as it has plenty of grab with no slip.

    This is the newest Jeep I have ever owned and I am in need of some enlightenment on what I may need to tackle here!
     
    heffleysmill, Jun 24, 2015
    #1
  2. Jun 24, 2015
    PeteL

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

    Hills of NH
    Joined:
    Aug 3, 2003
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    9,822
    My '88 YJ (5-speed/four cylinder) is not quite that bad, but I have always had a little grind or clunk getting into first or reverse. Almost as if the clutch pedal does not have enough 'throw.'

    It seems to be a generic design problem in YJ's as far as I can discover. If there is a solution I'd like to hear it.
    I fantasize about a larger diameter clutch master cylinder or a different pedal geometry.

    But first you should try bleeding/flushing the hydraulics. There is a bleed screw next to the bell housing.
     
    PeteL, Jun 24, 2015
    #2
  3. Jun 24, 2015
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
    Messages:
    4,422
    Trying to remember...
    The slave cyl is on the outside of the bell, correct?
    See if theres any play, have someone push in clutch and watch the clutch fork. Ive seen worn master/slave cylinders cause problems after i rebuilt or installed new transmissions.
     
    termin8ed, Jun 24, 2015
    #3
  4. Jun 24, 2015
    PeteL

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

    Hills of NH
    Joined:
    Aug 3, 2003
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    Not on mine ('88 ). I wish!

    The slave is a donut on the throwout bearing. http://jeepro-usa.com/jpproduct/OMIX/16909.06.jpg
     
    PeteL, Jun 24, 2015
    #4
  5. Jun 26, 2015
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
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    4,422
    Im thinking newer then.
    My guess would still be clutch though. Might have no problem going with no pedal being pushed, but sounds like the slave cyl cant push the cluch disk in far enough to keep the input shaft from spinning. Might be just enough play to allow slipping with the shifter in a gear and locked in to a syncro. Hope that makes sense...
    make sure the clutch pushrod isnt worn out?
     
    termin8ed, Jun 26, 2015
    #5
  6. Jun 27, 2015
    PeteL

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

    Hills of NH
    Joined:
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    I agree with your thoughts. However my '88 is very low miles, I did replace my slave, and I still have the problem - although the OPs '94 may be different.

    Lately I'm wondering if the type of gear lube would make a difference, although I've been following the factory specification. (W75-90)
     
    PeteL, Jun 27, 2015
    #6
  7. Jun 28, 2015
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
    Messages:
    4,422
    Not a bad idea either. Fairly easy to drain and see if sludge comes out
     
    termin8ed, Jun 28, 2015
    #7
  8. Jun 28, 2015
    Oldriginal86

    Oldriginal86 Member

    Pasadena, Md.
    Joined:
    Nov 5, 2014
    Messages:
    592
    Had a clutch issue on my sons YJ, took the clutch master cylinder apart and found broken pieces. Replaced it with new. All was good until that one started leaking out the back. Replaced again with a warranty replacement, clutch worked fine until he decided to try knocking a tree over in the neighborhood and totaled the jeep.
     
    Oldriginal86, Jun 28, 2015
    #8
  9. Jun 28, 2015
    Long&Low

    Long&Low Active Member

    Geauga County, OH
    Joined:
    Dec 13, 2009
    Messages:
    1,212
    Some YJ's have internal or external. I would agree, bleed the system, see if you get enough pedal travel then. If not, the your disc may have gone bad, bust a spring, etc, etc.

    Issue with going from 1 to R is probably worn synchros.
     
    Long&Low, Jun 28, 2015
    #9
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