Rear end knocking and grinding

Discussion in 'Maintenance' started by SuperBoomers, Feb 12, 2019 at 8:49 AM.

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  1. SuperBoomers

    SuperBoomers Member

    Howdy y'all so about a week ago I towed my boat and a week after every time I turn there's a knock in the rear in the center. So I went to a parking lot and did a circle at full turn and it was binding up real bad about half way. I'm assuming it's the rear diff. Any info would be helpful
     
    SuperBoomers, Feb 12, 2019 at 8:49 AM
    #1
    B-Man and texasred like this.
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  3. Crawdad

    Crawdad Well-Known Member

    Do you have e-locker?
    By rear center you mean the dif, I guess?
    Did you use the locker while pulling the boat? Or any other heavy loads on a hard surface?
    Sounds very unfortunate and probably dif related...
    Let us know what you figure out!
     
    Crawdad, Feb 12, 2019 at 9:09 AM
    #2
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  4. OP
    SuperBoomers

    SuperBoomers Member

    Yea it sounded like something was unstrapped in the back hitting my bed every turn but I have the lsd. No locker cus it's the sport.
     
    SuperBoomers, Feb 12, 2019 at 9:45 AM
    #3
    Crawdad, B-Man and texasred like this.
  5. Crawdad

    Crawdad Well-Known Member

    Hmmmm....

    I've been known for putting panduit straps on people's drive shafts... that makes people sh!t bricks... maybe someone is playing a trick on ya?
     
    Crawdad, Feb 12, 2019 at 1:00 PM
    #4
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  6. Crawdad

    Crawdad Well-Known Member

    Still sounds like a possibility of a broken tooth in the rear end, unfortunately...
     
    Crawdad, Feb 12, 2019 at 1:04 PM
    #5
    texasred, B-Man and SuperBoomers like this.
  7. OP
    SuperBoomers

    SuperBoomers Member

    Well good excuse to get the ARB air locker then lol
     
    SuperBoomers, Feb 12, 2019 at 1:10 PM
    #6
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  8. Crawdad

    Crawdad Well-Known Member

    And 4.56's!
     
    Crawdad, Feb 12, 2019 at 1:16 PM
    #7
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  9. bdarnold12

    bdarnold12 Well-Known Member

    Ahhh, you mean 2 sets of 4.56's.
     
    bdarnold12, Feb 12, 2019 at 7:41 PM
    #8
    texasred likes this.
  10. Crawdad

    Crawdad Well-Known Member

    Of course... 0_o
     
    Crawdad, Feb 12, 2019 at 10:29 PM
    #9
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  11. OR17TRD

    OR17TRD Well-Known Member

    Did you check the rear diff fluid? Maybe it’s low? When was the last time you changed it?
     
    OR17TRD, Feb 13, 2019 at 2:18 AM
    #10
    texasred, kp.taco and B-Man like this.
  12. bdarnold12

    bdarnold12 Well-Known Member

    I wasn't trying to be a smart ass but me having a 4x2 my mind gets stuck in 4x2 mode sometimes. I have to remember whatever you 4x4 guys do to one end has to include the other end.
     
    bdarnold12, Feb 13, 2019 at 7:35 AM
    #11
    texasred, OR17TRD and Crawdad like this.
  13. kp.taco

    kp.taco Well-Known Member

    ^^ this
     
    kp.taco, Feb 13, 2019 at 12:07 PM
    #12
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  14. Crawdad

    Crawdad Well-Known Member

    Plus, it's always fun to see what comes out of the drain hole... haha
     
    Crawdad, Feb 13, 2019 at 12:32 PM
    #13
    texasred, OR17TRD, kp.taco and 1 other person like this.
  15. OR17TRD

    OR17TRD Well-Known Member

    :eek:
    That’s what she said :D
     
    OR17TRD, Feb 14, 2019 at 2:39 AM
    #14
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  16. OP
    SuperBoomers

    SuperBoomers Member

    Like 2 months ago lol. I'm thinking they put the wrong fluid in but I got my truck scheduled for next Monday for the ARB rear air locker with some 4.88's
     
    SuperBoomers, Feb 14, 2019 at 1:20 PM
    #15
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  17. Bojangles

    Bojangles Well-Known Member

    What year is your truck?
    Some have true clutched LSD, others have brake actuated "lsd".
    One needs friction modifier added to gl5, the other doesnt.

    Did u check your leaf pack for any snapped leafs?
     
    Bojangles, Feb 15, 2019 at 4:58 PM
    #16
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  18. OP
    SuperBoomers

    SuperBoomers Member

    It's a 2011 but ill check the leafs. They should be good I just got the old man emu heavy duty ones like 3 months ago
     
    SuperBoomers, Feb 15, 2019 at 5:11 PM
    #17
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  19. texasred

    texasred Well-Known Member

    Let us know what they find when you upgrade.
     
    texasred, Feb 15, 2019 at 5:12 PM
    #18
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  20. Bojangles

    Bojangles Well-Known Member

    U wouldnt need any added friction modifier then, any 75w90 should be fine. Your truck relies on the brakes to control the limited slip.

    Make sure your u bolts are torqued to spec... I wanna say 85 ftlb ?
     
    Bojangles, Feb 15, 2019 at 5:18 PM
    #19
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  21. OP
    SuperBoomers

    SuperBoomers Member

    Will do!!
     
    SuperBoomers, Feb 15, 2019 at 5:23 PM
    #20
    texasred likes this.
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