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14bff pinion seal leakage

Discussion in 'The Garage' started by dremu, Nov 5, 2006.

  1. dremu

    dremu Officious Thread Derailer Premium Member

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    Haven't torn into it yet, but the tow rig's 14BFF is spraying gear oil over the underside of the truck :(

    Is this an easy seal to replace, like drop the shaft, unbolt and pull the yoke, and swap seals ... or is this a heinous thing where I gotta do something with a crush sleeve and such? While I've got a press, I've not done a gear swap on the 14 yet, so I've not had to deal with the whole crushing thing, whatever it is.

    -- A
     
  2. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Yes there is a crush sleeve there. I'd think you'd run the risk of crushing the current sleeve further during the yoke re-install. I sent my pinion assembly to NWF and let Kyle swap in new bearings, seals and crush sleeve for me. he only charged me an hours labor plus parts. I just don't have the right tools here to do the job confidently.

    Rene
     
  3. ryan22re

    ryan22re 1/2 ton status

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    Worn bearings require more preload than new bearings. I would mark the pinion nut, mark the pinion, change the seal, then tighten the nut where the marks line up, then go a little bit extra probably less than 1/6 of a turn past the marks.

    I also like to put some sealant on the splines to prevent a leak there.
     
  4. dremu

    dremu Officious Thread Derailer Premium Member

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    So I can remove the four or six bolts holding the whole thing in, do whatever with it, and put it back in, without harming the alignment of the crush whatchamadingle?

    In other words, the preload or whatever the sleeve sets is not set by those bolts, so I need not worry about them so much?

    Maybe the pinion assy is leaking from there... if I can remove it, re-gasket or goop it, and replace it without fiddling with the sleeve ... that would be a simple fix :)

    -- A
     
  5. ryan22re

    ryan22re 1/2 ton status

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    The preload on the bearings is set by the torque on the nut that holds the yoke on. Yes, you can remove the pinion without messing with the preload.

    Is it the seal leaking (on the yoke) or where the pinion bolts in?
     
  6. dremu

    dremu Officious Thread Derailer Premium Member

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    Well, this is a good question =)) ... I've not looked in detail, as the truck has larger issues (i.e. the No-Spin motor =))

    I'll take a look, and see what the scoop is.

    Thanks all!

    -- A
     
  7. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Just make sure that steel shim/gasket goes back in...

    Rene
     

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