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  1. #1

    Default ZF Hurth rattling in nuetral

    2002 ZF Hurth 450-A2, 2.03:1 ratio. Shifts fine, no noise in gear, but there is a distinct rattle in nuetral. Paired with a PCM 350. I googled it, looks like it could be a Damper plate.
    Anybody have any experience with this problem?

  2. #2
    Join Date
    Sep 2010
    Location
    Jersey Shore
    Posts
    4,588

    Default Re: ZF Hurth rattling in nuetral

    Make sure it is firing on all cylinders. One cylinder down and it will rattle.
    Chris
    Dockside Marine Services
    Jersey Shore.
    Mercruiser/Mercury Certified
    Let the insanity begin.

  3. #3

    Default Re: ZF Hurth rattling in nuetral

    Chris is right on the money, if engine is not running 100% smooth, noise will show up in tranny at idle. Bad plug wire, bad plug, etc.
    MJK

  4. #4

    Default Re: ZF Hurth rattling in nuetral

    Maraian, did you ever resolve it?

  5. #5

    Default Re: ZF Hurth rattling in nuetral

    Not really. The PO claims to have replaced the damper plater ( a very common cause) prior to purchase ( with pictures). But it still makes noise. After talking with many others with same tranny, this seems to be very common and is not really considered a problem. Appearently the ZF recommends using a thicker oil (10w40, or something similar) to quiet it, but it's not really an issue other than an annoyance, so I haven't done anything.
    Last edited by Maraian; 07-06-2017 at 09:15 PM.

  6. #6

    Default Re: ZF Hurth rattling in nuetral

    Quote Originally Posted by Docksidemarineservices View Post
    Make sure it is firing on all cylinders. One cylinder down and it will rattle.
    What's the best way to make sure firing on all cylinders?
    I did a compression check, it was good.
    i pulled all the plugs and they all looked the same.... black, a couple where wet ( with gas I think).
    i used a spark indicator light to make sure the dizzy was putting out.

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