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Thread: Noob member alert - ZD 30 to 4.2TDi conversion

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    Noob member alert - ZD 30 to 4.2TDi conversion

    Hi Iím James or Patrol Jim as my username. Iíve had a CRD GU VII and Iíve just bought a 2003
    ST-L ZD30 that is a sight to behold...however The old girl needs a new spring in her step. I have a 2003 factory auto trans and a 06 Black top low kmís and I need a little help before I take the leap. My question is, does the trans need any adaptor plate or do I need a TD 4.2 Bell-housing between the Manual engine and auto trans. Also do I need to change the diff gears for engine breaking? If so what ratio. Iím sure this subject is covered in the forum somewhere, if somebody could share the link, that would be beaut. 👍 good to be part of the crew! Patrol Jim
    Last edited by Patrol Jim; 4th May 2021 at 07:27 AM.

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    Patrol God Dhuck's Avatar
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    Welcome to the forum mate.
    In the words of a Dhuck "QUACK".

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    Patrol Freak jff45's Avatar
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    The ZD30 bell housing will bolt directly to the TD42 block but youíll need to do this modification for the TD starter motor.
    You have to drill & tap the 3 holes and remove a bit from the original starter holes. You can use the TD backing plate as a template.

    2ECD71CE-EBA0-4329-A954-8171C86EBFEC.jpeg
    John

    2001 GUII TI 4500 - Now converted to TD42T auto with Nomad valve body

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    SPAMINATOR growler2058's Avatar
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    G'day mate, welcome aboard

    IF YA DONT GET STUCK YA AINT TRYIN HARD ENOUGH........OR YA TOOK THE CHICKEN TRACK

    WARNING: TOWBALLS USED WITH SNATCHSTRAPS DO KILL!!

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    Patrol Freak jff45's Avatar
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    On the subject of diff gears, I run the original 3.9 in mine and find it good. Some like it to rev harder on the highway but Iím at 1850 rpm @ 100 km/h with TC manually locked. 2000 rpm @ 110.. Less engine noise and pulls easily from there when needed.
    John

    2001 GUII TI 4500 - Now converted to TD42T auto with Nomad valve body

  7. The Following User Says Thank You to jff45 For This Useful Post:

    Rossco (4th May 2021)

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    Welcome aboard

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    Patrol Guru 0-TJ-0's Avatar
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    Quote Originally Posted by jff45 View Post
    On the subject of diff gears, I run the original 3.9 in mine and find it good. Some like it to rev harder on the highway but I’m at 1850 rpm @ 100 km/h with TC manually locked. 2000 rpm @ 110.. Less engine noise and pulls easily from there when needed.
    That sounds perfect to me. I've got a manual so gear ratios are probably a bit different but I'd love for mine to sit in those rev ranges. I reckon mines about 2300 at 110kms and it just feels higher than it needs to be, especially after the pump upgrades.
    2003 GU TD42 with a few extra ponies

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