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Thread: drive train hum

  1. #1
    Join Date
    Jan 2016
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    drive train hum

    Hi there,

    Since a few weeks the train noise of my P38 has become a bit too much. I have been wrecking my head trying to figure out where this comes from. General consensus is that it comes from the u-joints of the front shaft. I read about the out of phase design and the tilted diff and I have checked that straight away. I have also checked for play on the u joints and since they are fairly cheap I rebuilt a spare shaft and put that in yesterday. Almost no difference.

    My range has a 2" lift. There is a difference between highway and normal mode. I did recalibrate the EAS after the lift so I am probably riding a bit higher on highway mode but not by much I think. Last year I replaced just about everything drive train related; half shafts, rebuilt diff with lockers and pegging, rebuilt transfer case etc. etc. so I must assume that everything related to those parts is most likely in order but I can not be certain.

    At one point I suspected the front left CV since my boot had been punctered a while back and although I could not find any evidence, some dirt my have gottin in when the stick (I asume) punctured it. Since the drone whilst driving is of a fairly high pitch I can only conclude that it must be anywhere before the diff input since that turns at a higher speed then the axles/wheels.

    Before I buy myself some double cardan beauties though, I would like to check what the actual problem is in stead of just trial and error buying Anyone any thoughts?

    Thanks!
    -P

  2. #2
    Join Date
    May 2003
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    In the D2 we'd remove the front shaft and drive with the cdl locked,, that would eliminate the carden as the problem,,
    Can you RR guys do that?
    "How long since you've visited The Good Oil?"

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  3. #3
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    I guess we could, though I am not sure what the VCU would think about that I guess for a short test drive it would never be a problem...

    I'll see if I can manage to do that

    -P

  4. #4
    Join Date
    May 2003
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    Sunny Coast QLD
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    Anyone else have a thought on running a RR on just one shaft???
    (before something else goes bang....)
    "How long since you've visited The Good Oil?"

    Live simply.
    Love generously.
    Care deeply.
    Speak kindly.


    '93 V8
    Rossi
    '97 to '07. sold.
    '01 V8 D2
    '06 to 10. written off.
    '03 4.6 V8 HSE D2a with Tornado ECM
    '10 to ???
    Its a gas gas gas Tug?
    Making Lemonade since 2016.


    Golf GTX Tourer MKIII 19' of Heaven


  5. #5
    Join Date
    May 2003
    Location
    Sunny Coast QLD
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    Just had the word from GOD down in Tassie,, and it will be fine for a test
    "How long since you've visited The Good Oil?"

    Live simply.
    Love generously.
    Care deeply.
    Speak kindly.


    '93 V8
    Rossi
    '97 to '07. sold.
    '01 V8 D2
    '06 to 10. written off.
    '03 4.6 V8 HSE D2a with Tornado ECM
    '10 to ???
    Its a gas gas gas Tug?
    Making Lemonade since 2016.


    Golf GTX Tourer MKIII 19' of Heaven


  6. #6
    Join Date
    Jan 1970
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    Quote Originally Posted by Pedro_The_Swift View Post
    Just had the word from GOD down in Tassie,, and it will be fine for a test
    cheers chris


    My Toy 04 D2a Td5 Manual With Lots of Goodie Goodness
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  7. #7
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    Quote Originally Posted by rangieman View Post
    Pedro was referring to the God in Tassie not the son called the messiah. I know it gets confusing, Justin and Jesus both start with the letter J.

    "Mail Order Specialists for Land Rover Vehicle Spare Parts"
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  8. #8
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    Quote Originally Posted by Roverlord off road spares View Post
    Pedro was referring to the God in Tassie not the son called the messiah. I know it gets confusing, Justin and Jesus both start with the letter J.
    Justin, Jesus! .. Jehova .. they all start with a J.

    Between the three of them, they have The Holy Trinity of J's covered!
    Cheers,
    Arthur.

    '99 D1 300 Tdi Auto

  9. #9
    Join Date
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    Please thank "god" down in tassie for me when you see him

    In the mean time, e31.jpg from technical to monty python. I love python!

    -P

  10. #10
    Join Date
    May 2008
    Location
    Camp Hill, Brisbane
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    200
    My D2 driveline drone - particularly at one speed, or a narrow range of speeds was a deteriorating rubber donut on the rear propshaft to diff coupling. They look fine until you remove it and flex it a bit. Don't even know if I have one on my P38. I'll check when the rain stops.
    Cheers,
    Steve

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