cluncking back end | The Z Club of Great Britain
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cluncking back end

Discussion in 'S30 (240Z,260Z,280Z) Drivetrain' started by mrzed, May 27, 2017.

  1. mrzed

    mrzed Forum User

    hi guys , i have a noisy cluncking noise when reversing and then setting off in 1st gear and in second when accelerating and decellerating ,
    it is not as noticable when in higher gears ,it is a 74 260z
    could this be universal joints?
    any ideas anyone
    cheers jay
  2. jonbills

    ZClub Administrator
    Staff Member Committee Member

    I think with UJs you'll have clacking in all gears - I'd think more likely something like a gearbox or diff mount, or poss even movement in a control arm.
  3. mrzed

    mrzed Forum User

    hi Jon , just been for a ride in it and it is in all gears ,when giving it gas then letting it off then back on ,
    it has always been noisey but im sure its getting worse , louder
  4. yellowz

    Z Club Member

    Last edited by a moderator: May 28, 2017
  5. mrzed

    mrzed Forum User

  6. toopy

    Z Club Member

    Might be worth doing a cursory spanner check on all the major bolts/nuts in case something has gradually loosened over time :)
  7. Stockdale

    Z Club Member

    Diff clunking is not unusual in Z's. I experienced it in all my earlier cars (240z and 260z 2+2) used in the late 1970's and experience it still in my current '74 260z. Unless its extreme or sudden onset then just don't worry about it. If it's there then it probably has alway been any is unlikely to get worse for a very long time. Engineering tolerance was very different when these cars were made (points were set by around the thickness of a fag packet and worked fine). Enjoy the car and the noise alongside a bit of gear whine, whistling around the windows, the 'wow and flutter' of radio caroline and very may rattles. Its what helps make older cars so endearing.
  8. Wyn

    Z Club Member

    Assuming none of the prop/drive shaft uj's are worn out go for the front diff mount imo
    See if you can "lift" the front of the diff when under the car ?
    Unless been replaced its probably knackered by now
    New std will be fine. Fink you can still get them

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