Results 1 to 9 of 9

Thread: Clunk in DII transmission - diagnosis anyone?

  1. 3rd July 2010, 10:39 PM #1
    Hartley
    Hartley is offline Fossicker
    Join Date
    Oct 2007
    Location
    Usually in Griffith NSW
    Posts
    49
    Total Downloaded
    0

    Clunk in DII transmission - diagnosis anyone?

    I need diagnostic help from the gurus.

    I get a single clunk in the transmission when braking as I get down to about 20km/h. Only occurs in DRIVE, if I coast and brake in NEUTRAL it does not occur. It never occurs more than once on a decel and sometimes not at all.
    All UJs are good, splines in prop shafts ok, slop in diffs seems about the usual standard. Auto box is flaring between second and third, but the clunk has come more recently. I think the auto problem started from ATF starvation from sludge in the filter. Is this likely to be related or something else? Could it be in the CV joints, I get no noises on turning?

    Is this symptomatic of something anyone has seen before? I suspect showing in Drive and not in Neutral might mean something but I dont know what.
    Reply With Quote Reply With Quote
  2. 3rd July 2010, 10:57 PM #2
    Slunnie's Avatar
    Slunnie
    Slunnie is online now Swaggie Gold Subscriber
    Join Date
    Jan 1970
    Location
    Central West NSW
    Posts
    14,134
    Total Downloaded
    99.87 MB
    Hmmm, I would have the autos faults cleared and see what it does or if it comes back. If so it may very well be rebuild time.
    Cheers
    Slunnie


    ~ Discovery II Td5 ~ Discovery 3dr V8 ~ Series IIa 6cyl ute ~ Series II V8 ute ~
    Reply With Quote Reply With Quote
  3. 4th July 2010, 09:26 AM #3
    harro's Avatar
    harro
    harro is offline Wizard Subscriber
    Join Date
    Jan 1970
    Location
    cairns
    Posts
    1,675
    Total Downloaded
    0
    edited
    Paul.

    77 series3 (sold)
    95 300Tdi Ute (sold)
    2003 XTREME Td5

    I thought I was wrong once, but I was mistaken.
    Reply With Quote Reply With Quote
  4. 4th July 2010, 09:28 AM #4
    harro's Avatar
    harro
    harro is offline Wizard Subscriber
    Join Date
    Jan 1970
    Location
    cairns
    Posts
    1,675
    Total Downloaded
    0
    Check the transmission brake adjustment.
    The drum gets dust in it and drags on deceleration if it adjusted up to close giving a shuddering effect although I don't know about a single clunk.
    It does it on the Defenders anyway.

    Cheers,
    Paul.
    Paul.

    77 series3 (sold)
    95 300Tdi Ute (sold)
    2003 XTREME Td5

    I thought I was wrong once, but I was mistaken.
    Reply With Quote Reply With Quote
  5. 4th July 2010, 12:53 PM #5
    gazk's Avatar
    gazk
    gazk is offline Master
    Join Date
    Dec 2007
    Location
    Cambewarra, NSW
    Posts
    517
    Total Downloaded
    0
    Do you get any "clunks" at gear shifts during acceleration? Mine (TD5 Auto)was doing that and had no power for the first 10-20 seconds after start - fixed by fitting new MAF.

    Gary
    Reply With Quote Reply With Quote
  6. 4th July 2010, 01:33 PM #6
    Tombie Guest
    20km/h slowing down is your Torque Converter clutch unlocking...

    Flared changes, etc is either:

    - low fluid / filter blocked (cheap)
    - Out of spec MAF (moderate)
    - Stuffed Gearbox (Expensive)
    Reply With Quote Reply With Quote
  7. 4th July 2010, 03:33 PM #7
    PhilipA
    PhilipA is offline Swaggie Subscriber
    Join Date
    Jan 1970
    Location
    Avoca Beach
    Posts
    14,152
    Total Downloaded
    0
    When I worked at DPI , one of the directors bought/leased himself a 2001 AFAIR.
    They put 3 LT230s in it because of clunks, and even the final one which was hand built still clunked but not as badly as the others.

    So my guess it is the LT230 now it has some age on it. You will get that with any gear driven transfer.
    Regards Philip A
    Reply With Quote Reply With Quote
  8. 4th July 2010, 04:56 PM #8
    INter674
    INter674 is offline Wizard
    Join Date
    Jan 2007
    Posts
    1,251
    Total Downloaded
    0
    not knowing much about D2, I might be way off, but the ZF on D1's will clunk downshifting at low speeds if the kick down cable is too tight....
    Reply With Quote Reply With Quote
  9. 4th July 2010, 06:27 PM #9
    PhilipA
    PhilipA is offline Swaggie Subscriber
    Join Date
    Jan 1970
    Location
    Avoca Beach
    Posts
    14,152
    Total Downloaded
    0
    I get a single clunk in the transmission when braking as I get down to about 20km/h. Only occurs in DRIVE, if I coast and brake in NEUTRAL it does not occur. It never occurs more than once on a decel and sometimes not at all.
    I have not researched the D11 but certainly the 4HP22 in a 3.9 RRC or Disco 1 will change down to first as the car comes under 10Kmh or so. On some occasions even with a BW transfer you will get a clunk as it does this.

    I think it likely that the 4HP22EH probably drops down through 2nd and first as it comes to a halt and the clunk is caused by slop in the transfer caseduring the torque reversal.
    Regards Philip A
    Reply With Quote Reply With Quote
« Cooling issue | New type of Torque Biasing diff »

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules

Search AULRO.com ONLY!
 Search All the Web!