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How do you break in *FRONT* gears?

Discussion in 'The Garage' started by 8_YOUR_H2, Mar 13, 2003.

  1. 8_YOUR_H2

    8_YOUR_H2 1/2 ton status

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    Ok, I need to do the 500 mile break in for my new gears. Do you have to break in the fronts? I would have to do 500 miles on dry pavement in 4HI with drive flanges for 20 minute intervals letting the diff cool between trips, for some reason that dosent sound like fun.
     
  2. TXsizeK5

    TXsizeK5 1/2 ton status

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    coudlnt you just lock your front hubs and drive that like? Or does that not turn your diff gears
     
  3. BlazerGuy

    BlazerGuy 3/4 ton status

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    Lockin' the hubs turns the gears and driveshaft, they just won't be under load...maybe you could drive on a gravel/fire road with the t-case engaged to help break 'em in?? /forums/images/graemlins/1zhelp.gif
     
  4. BigOrange90Jimmy

    BigOrange90Jimmy 1/2 ton status Premium Member

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    Just think about it this way. All trucks with 4wd come from the factory brand new don't they? Does anyone bother to break in the front when we get them? I wouldn't worry about it, but that's just my opinion.
     
  5. bigmack

    bigmack 1/2 ton status

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    I agree, I have put 2 new gear sets in my front, one 3.73 and one 4.10 and didn't break them in at all. Both worked great with no problems. I know this is probably not the proper way to do it, but I wasn't going to drive around all day in 4WD.
     
  6. BlazerGuy

    BlazerGuy 3/4 ton status

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    Another thought: Maybe it doesn't matter if the gears are broken in, since they won't see more than 10-15 mph...hmmm
     
  7. BOWTIE

    BOWTIE 1/2 ton status

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    not sure if it's the proper way, but this is what i did. i just locked in my hubs and drove back and forth from work for about two weeks. after that i changed the gear lube and called it done.
     
  8. zakk

    zakk 1/2 ton status

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    i think the rears are the ones to worry about as they have power 100% of thier lives and only 10-15% of the fronts lives. Or that is if you are not a trailered rig.
     
  9. kennyw

    kennyw N9PHW Premium Member

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    They dont have to have power to them to break them in. If you have driveflanges the front will rotate 100% of the time and if you drive it in 20 minute increments and let it cool in between... After 500 miles it should be considered broke in.
     
  10. rodzzilla

    rodzzilla 1/2 ton status

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    Pull the rear shaft and drive it over to see my pile of parts in front wheel drive. /forums/images/graemlins/grin.gif Still haven't had time to mess w/the bender /forums/images/graemlins/mad.gif

    /forums/images/graemlins/crewcab.gif /forums/images/graemlins/burb.gif
     
  11. 8_YOUR_H2

    8_YOUR_H2 1/2 ton status

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    I have been wondering where you were.... IF I get that sucker going this weekend Ill stop by!
     
  12. SCOTTS_4X

    SCOTTS_4X 1/2 ton status

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    [ QUOTE ]
    not sure if it's the proper way, but this is what i did. i just locked in my hubs and drove back and forth from work for about two weeks. after that i changed the gear lube and called it done.




    [/ QUOTE ]

    one would think that this would make sense, but infact it does nothing to break in the drive side of the gears. if you apply power to the pinion gear, you are applying power to the drive side of the teeth. if you apply power to the ring gear (I.E. locking the hubs and driving around in 2wd) you are going to be putting the wear on the coast side of the gears. did that make any sense? it's kinda hard to follow unles you have a diff to look at.

    -Scott
     

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