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Dana 27 pinion bearing

Discussion in 'Early CJ5 and CJ6 Tech' started by noahlon, Mar 13, 2014.

  1. noahlon

    noahlon Old Fart

    Is it possible to replace the Dana 27 outer pinion bearing without tearing it down?
     
    noahlon, Mar 13, 2014
    #1
  2. oldtime

    oldtime oldtime

    Yes sort of.
    Drain, pull pinion seal, then pull bearing.
    Pulling the bearing cup could prove to be a big problem.
     
    Last edited: Mar 13, 2014
    oldtime, Mar 13, 2014
    #2
  3. noahlon

    noahlon Old Fart

    isn't the beveled edge facing out?
     
    noahlon, Mar 13, 2014
    #3
  4. noahlon

    noahlon Old Fart

    if the cup isn't damaged, is it still necessary to replace it?
     
    noahlon, Mar 13, 2014
    #4
  5. oldtime

    oldtime oldtime

    Yes the cup face (cone face) is toward the rear of the front axle.
     
    oldtime, Mar 13, 2014
    #5
  6. nickmil

    nickmil In mothballs.

    Bearings and races (cones and cups) wear as a set. If one is replaced its mate needs replaced unless you want to do it again.


    Sent from my iPhone
     
    nickmil, Mar 14, 2014
    #6
  7. jasonjp62

    jasonjp62 Member

    Been there done that, Nick is correct!
     
    jasonjp62, Mar 14, 2014
    #7
  8. timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Is it possible to pull the race out without removing the pinion? Maybe a slide hammer?

    I ran into this on my VW, where the outer rear wheel bearing needed to be replaced. It would have been much easier to leave the disk in place, since it was trapped by the caliper bracket - and removing the caliper bracket was an ordeal (Remove muffler, Bolt-Out on breaker bar, order special replacement bolts, wait for bolts).
     
    timgr, Mar 14, 2014
    #8
  9. DanStew

    DanStew Preowned Merkin salesman Staff Member

    I am going against the grain on this one. If the cup is good, you probably could get away with just replacing the bearing. Do you have locking hubs. If so there is no use of the axle in 2WD. How often do you go 4 wheelin? Chances are the bearing will last a long time since the axle is used mainly for slow speeds. And I have been getting bearings lately that do not come in matched sets, you buy the cone and the race separately. Ultimately it is up to you. The proper way is to replace both. But you could change the bearing only, but i would only do that if the race was in good shape.
     
    DanStew, Mar 14, 2014
    #9
  10. nickmil

    nickmil In mothballs.


    When the bearing and race are new they have not "worn in" together. Once they have been run together for a length of time they wear together with specific patterns and angles.
    Would you mix and match engine crank or rod bearings once they've been run together?


    Sent from my iPhone
     
    nickmil, Mar 17, 2014
    #10