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Front diff. whining noise

Discussion in 'General Jeep Discussion' started by ElderBot5000, Aug 16, 2017.

  1. Aug 16, 2017 at 9:40 AM
    #1
    ElderBot5000

    #1
    ElderBot5000 [OP] New Member

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    95 Grand Cherokee 5.2 l
    I have a 95 Grand Cherokee all wheel drive I bought last year. When I bought it the front drive line was missing. I purchased a new one and when it's in I can hear a whining noise coming from the front diff. The faster I drive the higher pitch the noise gets. When the drive line is not in there is no noise. What are the possibilities that I should be looking at repairing. Any information would be helpful, thank you.
     
    ElderBot5000, Aug 16, 2017
    #1
  2. Aug 16, 2017 at 10:00 AM
    #2
    chris4x4

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    chris4x4 With sufficient thrust, pigs fly just fine Moderator

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    Welcome! Is the fluid level correct in the differential?
     
    chris4x4, Aug 16, 2017
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  3. Aug 16, 2017 at 10:07 AM
    #3
    ElderBot5000

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    ElderBot5000 [OP] New Member

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    Yes, I replaced the fluids in the front and rear diffs and the transfer case when I first put in the front drive line. Also the whining noise is louder under load,accelerating or decelerating. when I'm maintaining a speed its much quieter.
     
    ElderBot5000, Aug 16, 2017
    #3
  4. Aug 16, 2017 at 10:18 AM
    #4
    chris4x4

    #4
    chris4x4 With sufficient thrust, pigs fly just fine Moderator

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    Sounds like a bearing. Hopefully someone will be able to offer more assistance
     
    chris4x4, Aug 16, 2017
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    JKBob 25 and OFFGRID like this.
  5. Aug 16, 2017 at 6:44 PM
    #5
    OFFGRID

    #5
    OFFGRID Well-Known Member

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    1979 Jeep CJ7, 258, TH350, NP208
    Howell fuel injection, header, HEI distributor, TH350, NP208, SOA lift with YJ springs in the front & GW springs in the Rear. AMC20 with G2 1 piece chromos trussed, Dana 30 with G2 chromos and 760x ujoints and MM Stainless Hubs, Geared 4.56. Tom Woods shafts, Metal cloaks, Caged, 37" Toyo MTs.
    Yep. What Chris said. Sounds like a bearing. What do you mean by "drive line"? Are you talking about the drive shaft? If so, and you had no noise without the shaft and then noise with the shaft, the only change in motion that you have made is now that the front outputshaft and bearing on the Tcase are turning. That would be my first suspect. My second would be the pinion bearing on the front diff maybe. I say maybe because I would think that the front diff would squeal with or without the shaft, but just maybe it needs a little preload from the drive shaft to cause it to squeal.
     
    OFFGRID, Aug 16, 2017
    #5
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