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Thread: clunking sound when changing direction

  1. #1
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    clunking sound when changing direction

    Hi all, sorry for the flood of posts but I have recently been properly using the P38 since a long time so...

    Whenever I drive off after having reversed or whenever I am reversing after I have been going forward for a while I get this clunking sound and I am not sure where that comes from. My diffs are a few K old ashcrofts with diff pinning and lockers, the halfshafts and CV's are new HD's from lucky8 and the transfercase is a refurbed ashcroft unit so I reckon they are not the culprits. I have checked my drive shafts and there is no play that I can see on the U joints but then again, I can only apply so much force with my hands

    The drive shafts (at least the front one) came of a wrecker with a lot more mileage on it than my current vehicle but I'm not sure that should be a problem. Since lifting the vehicle I do plan on getting double cardan shafts and that might solve the problem but in the mean time I'm trying to figure this one out.

    Any thoughts are highly appreciated!

    Thanks,
    -P

  2. #2
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    Have you changed the oil in your diffs recently?
    You only get one shot at life, Aim well

    2004 D2 "S" V8 auto, with a few Mods gone
    2007 79 Series Landcruiser V8 Ute, With a few Mods.
    4.6m Quintrex boat
    20' Jayco Expanda caravan gone

  3. #3
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    The oil is as old as the diffs, less than a year and a few K km's.

  4. #4
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    This is a common problem with P38's, there is a small amount of play where the axles engage with the diff, the noise happens on change of direction (ie, reverse to forward), causing a clunking sound.
    LR issued a fix for this, placing locktite on the splines was the fix from memory.
    My viscous coupling was partially seized when I noticed the clunking, but it was far less apparent after I fitted a new viscous coupling.
    I know your tranfer case is a refurbed one, I'm assuming the VC would be a new one. Might be worth checking for signs of seizing though, just incase!
    Hope that is of some help,
    Cheers, Pete.

  5. #5
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    Is this just a single clunk as you move from forward to reverse/reverse to forward or something else?
    Gary

    2007 Range Rover Sport TDV8

    Modified 1996 p38a HSE sold

  6. #6
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    it is one single clunk, difficult to assertain from where. From the transfercase to the front somewhere it seems.

    -P

  7. #7
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    That will just be the free play in the shafts on forward/reverse changes, it’s a normal P38 characteristic and is by no means harmful to any of the drivetrain components. It’s merely a noise to get used to (as defender drivers often say haha)

    Cheers
    Keithy

    2002 P38 Range Rover HSE

    Sequential LPG - Redarc Charger - TPMS - Ashcroft Locker
    Wheel Carrier - Bullbar & Spotlights - 285/75/16 BFG KM3’s
    On Board Solar - Stainless Snorkel - 2” Suspension Lift

  8. #8
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    Quote Originally Posted by Keithy P38 View Post
    That will just be the free play in the shafts on forward/reverse changes, it’s a normal P38 characteristic and is by no means harmful to any of the drivetrain components. It’s merely a noise to get used to (as defender drivers often say haha)

    Cheers
    Keithy
    Notice my new and first ever HSE does it as well Keith, more noticeable when it's had a bit of a drive, and is warm, sounds from the drivers side back to me clunking sound when changing direction

  9. #9
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    Hmm oke

    I'll just live with the clunking and pretend all is well then.

    Thanks for the input guys!

    Cheers,
    -P

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