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Greaseable T90 Transmission Throwout Bearing

Discussion in 'Early CJ5 and CJ6 Tech' started by Kory S, May 28, 2019.

  1. May 28, 2019
    Kory S

    Kory S New Member

    Youngstown Oh
    Joined:
    May 28, 2019
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    3
    Over Memorial Day weekend I finished up the installation of my rebuilt T90 trans and Dana 18 t-case for my 1964 CJ5 (F134 engine). My old man had an idea to prolong the life of the throw out bearing. So I made a simple mod to the throwout bearing by drilling a small hole in the bearing housing, threading in a grease fitting (filed down to not contact the inner race) and tack welded it to the bearing case to allow for a greaseable bearing. Has anyone done this? Pro’s/Con’s?

    Thanks for the input.
     
  2. May 28, 2019
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Sep 21, 2002
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    12,367
    How can you get to it to grease it? Over greasing could ruin your clutch but I'm sure you've thought of that. I don't know about all of them but do know at least some heavy trucks had/have greaseable throw out bearings.
     
    jpflat2a likes this.
  3. May 28, 2019
    PeteL

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

    Hills of NH
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    Aug 3, 2003
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    Older vehicles sometimes had greaseable throw-outs.

    Seems reassuring, although in reality very few throw-out bearings go bad today.
     
  4. May 28, 2019
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Submerging in mud and water as often as possible has been the only reason mine have gone bad.
     
  5. May 29, 2019
    colojeepguy

    colojeepguy Colorado Springs

    At the foot of...
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    Apr 4, 2010
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    7,110
    Yep, and they usually have a flexible tube that goes out of the flywheel housing to enable the tech to grease the bearing.
     
  6. May 29, 2019
    Chilly

    Chilly Active Member

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    Where did the drilling debris go? Most out, none into bearing I hope?
     
    Thean likes this.
  7. May 29, 2019
    Kory S

    Kory S New Member

    Youngstown Oh
    Joined:
    May 28, 2019
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    I will just lift the floor panel over the trans and pull the two bolts that hold the vented clutch cover off and just squirt a little grease in. I greased up the drill bit before drilling to catch the drill shavings. As stated the water getting into the bearing is what my thought was too so purge it out by greasing it. This isn’t something I’m going to do all of the time. I submerge it deep enough I will lube it. Just as a 12 veteran as a heavy truck technician maintenance is a top priority of mine and anytime I get into mud I grease all fittings. “I even put grease fittings on the bell crank at the ball joints from frame to trans/t-case”

    Thanks for the input
     
    Glenn likes this.
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