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torque spec for 14bff spindle nut?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by KRAZIE87K5, Nov 28, 2001.

  1. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    Anyone happen to know the torque spec for the spindle nuts on a 14BFF? I have this funny, intermittant, humming noise at cruising speed, and I think that might be the cause.

    I just did the rear disc conversion, and was thinking that maybe I didn't re-torque them properly? I sure hope so...

    <font color=red>GOT MUD???</font color=red>
    My license plate reads:<font color=blue> 8 YR SUV</font color=blue>
    <a target="_blank" href=http://24.10.209.54/bigolk5.htm>http://24.10.209.54/bigolk5.htm</a>
    454/TH400/NP205 - 14BFF/D60/w/ 4.10s
     
  2. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    someone? ANYONE???!!!!

    <font color=red>GOT MUD???</font color=red>
    My license plate reads:<font color=blue> 8 YR SUV</font color=blue>
    <a target="_blank" href=http://24.10.209.54/bigolk5.htm>http://24.10.209.54/bigolk5.htm</a>
    454/TH400/NP205 - 14BFF/D60/w/ 4.10s
     
  3. HarryH3

    HarryH3 1 ton status Author

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    Going from memory here... Torque inner nut to 50 lb/ft, while rotating the hub. Back off and retighten to 35 lb/ft. Can't recall the spec for the outer nut, but it should be pretty tight! [​IMG]

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
    It's a great day to be alive...
     
  4. 45acp

    45acp 1/2 ton status

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    Dan, This comes right out of the Light Truck Shop Manual.
    1. Remove axle shaft and raise vehicle until wheel is free to rotate.
    2. Keyways and threads on tube and nut must be clean and free from chips, burrs and shavings.
    3. Disengage tand of retainer and remove retainer from axle housing tube.
    4. Torque adjusting nut to 50 ft. lbs., at the same time rotating the hub assembly and making sure bearing cones are seated and in contact with the spindle shoulder.
    5. Back the nut off until the nut slot lines up with the axle keyway and install the key. On models with a nut lock, bend the square tang over the slot or flat of the lcoknut. Do not back the nut off more than one slot.
    Good Luck, Bill

    <font color=red> Bill, "Shop Rat" </font color=red>
    <a target="_blank" href=http://coloradok5.com/gallery/Shop-Rat>http://coloradok5.com/gallery/Shop-Rat</a>
     
  5. 502Burban

    502Burban 1/2 ton status

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    My GM Service Manuals for '73 &amp; '78 say to torque to 50 lbs while spinning the hub. Then back off and re-torque to 35 lbs. Then back off 1/4-turn. Outer locknut should then be torqued to 65 lbs.

    The '88 Service Manual has a different procedure, which should give essentially the same results. It says to torque to 50lbs while spinning the hub. Then back off and bring the adjusting nut into contact with the bearing with 0 lbs torque. Outer locknut should still be torqued to 65 lbs.

    Robb
    '73 GMC Suburban - 502DFI
    <a target="_blank" href=http://community.webshots.com/user/robbrj>community.webshots.com/user/robbrj</a>
     
  6. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    im going to say this at the risk of sounding stupid, but -

    inner and outer? the only one i worked with was the one inside the hub... with the ring-clip and the little square locking-pin. is this the inner or the outer? [​IMG]

    thanks all...

    <font color=red>GOT MUD???</font color=red>
    My license plate reads:<font color=blue> 8 YR SUV</font color=blue>
    <a target="_blank" href=http://24.10.209.54/bigolk5.htm>http://24.10.209.54/bigolk5.htm</a>
    454/TH400/NP205 - 14BFF/D60/w/ 4.10s
     
  7. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    bill- yours makes sense - but its doesnt mention backing it off and then retorqueing? (sp)

    Thanks Bill!

    <font color=red>GOT MUD???</font color=red>
    My license plate reads:<font color=blue> 8 YR SUV</font color=blue>
    <a target="_blank" href=http://24.10.209.54/bigolk5.htm>http://24.10.209.54/bigolk5.htm</a>
    454/TH400/NP205 - 14BFF/D60/w/ 4.10s
     
  8. 45acp

    45acp 1/2 ton status

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    Dan, From the outside in you should have these parts.
    1. Axle shaft
    2. Shaft to hub bolts
    3. Retainer
    4. Key
    5. Adjusting nut
    6. Hub outer bearing
    7. Snap ring
    8. Hub inner bearing
    9. Oil seal

    <font color=red> Bill, "Shop Rat" </font color=red>
    <a target="_blank" href=http://coloradok5.com/gallery/Shop-Rat>http://coloradok5.com/gallery/Shop-Rat</a>
     
  9. 502Burban

    502Burban 1/2 ton status

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    My bad. [​IMG] These things come in two flavors. One type is like yours, with the adjusting nut, ring-clip and locking pin. The other is like mine, with an inner adjusting nut, a washer with tabs that you bend up to lock the outer locking nut, then the outer locking nut.

    Guess I should have asked which one you had. Just thinking about the way mine is set up. If you ignore the stuff about the 65lbs on the outer nut, you will be fine.[​IMG]

    Robb
    '73 GMC Suburban - 502DFI
    <a target="_blank" href=http://community.webshots.com/user/robbrj>community.webshots.com/user/robbrj</a>
     
  10. 45acp

    45acp 1/2 ton status

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    Dan, I have seen this proceedure written up many different ways. All of the ones above are right. It just depends on the manual you are reading. Pick the one that makes the most sence to you and try it.

    <font color=red> Bill, "Shop Rat" </font color=red>
    <a target="_blank" href=http://coloradok5.com/gallery/Shop-Rat>http://coloradok5.com/gallery/Shop-Rat</a>
     
  11. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    Cool - thanks Robb and Bill! I'm off to the driveway then!

    Go check out my post on the D60 ball joint [​IMG] - maybe on day, I will be able to drive the truck for AN ENTIRE WEEK without having to FUTZ with it! [​IMG][​IMG]

    <font color=red>GOT MUD???</font color=red>
    My license plate reads:<font color=blue> 8 YR SUV</font color=blue>
    <a target="_blank" href=http://24.10.209.54/bigolk5.htm>http://24.10.209.54/bigolk5.htm</a>
    454/TH400/NP205 - 14BFF/D60/w/ 4.10s
     
  12. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    Cool - thanks Robb and Bill! I'm off to the driveway then!

    Go check out my post on the D60 ball joint [​IMG] - maybe one day, I will be able to drive the truck for AN ENTIRE WEEK without having to FUTZ with it! [​IMG][​IMG]

    <font color=red>GOT MUD???</font color=red>
    My license plate reads:<font color=blue> 8 YR SUV</font color=blue>
    <a target="_blank" href=http://24.10.209.54/bigolk5.htm>http://24.10.209.54/bigolk5.htm</a>
    454/TH400/NP205 - 14BFF/D60/w/ 4.10s
     
  13. 502Burban

    502Burban 1/2 ton status

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    Bill's got the parts order correct for your axle. I think you still need to back off and re-torque, though. If it would help, I can scan in an exploded diagram from the service manual for you.

    Just let me know,

    Robb
    '73 GMC Suburban - 502DFI
    <a target="_blank" href=http://community.webshots.com/user/robbrj>community.webshots.com/user/robbrj</a>
     
  14. michaelm

    michaelm 1/2 ton status

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    as with most oil bath wheel bearings they run zero preload. you pretorque them to ensure the bearings are seated and then back it off
     
  15. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    thanks robb but its all taken care of... even in the rain.

    however the darn noise is still there... so check out this post - might this really be the cause????

    <a target="_blank" href=http://coloradok5.com/forums/showflat.php?Cat=&amp;Board=blazer4x4&amp;Number=277000&amp;page=0&amp;view=collapsed&amp;sb=5&amp;o=0&amp;part=>click here for my D60 lower ball joint thread</a>

    <font color=red>GOT MUD???</font color=red>
    My license plate reads:<font color=blue> 8 YR SUV</font color=blue>
    <a target="_blank" href=http://24.10.209.54/bigolk5.htm>http://24.10.209.54/bigolk5.htm</a>
    454/TH400/NP205 - 14BFF/D60/w/ 4.10s
     

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