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Thread: Series HRTC Conversion?

  1. #11
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    Originally posted by Tikirocker
    I'm free tomorrow mate but I won't have the car unfortunately ... what did you have in mind?
    I am going to the royal easter show with some of the kids from school, when we get there they half half an hour with us and then head off for free time for a few hours, if you wanted to we could catch up there have a wander around and discuss the plans for the next couple of weeks. I left a message on your answering machine a few mins ago, if you ring my mobile before 2pm we can have a quick chat. 0428969828.

    If you cant make the whole day we can just arrange a time to meet at a main gate or something and just catch up for a couple of hours. I hate the show and wouldnt mind some meaninful inteligent conversation to keep me occupied. Matt
    <a href=https://the4wdzone.com.au/wp-content/uploads/logo.png target=_blank>https://the4wdzone.com.au/wp-content/uploads/logo.png</a>
    The 4wd Zone/Opposite Lock Bathurst
    263 Stewart Street, Bathurst, NSW
    http://www.the4wdzone.com.au/
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  2. #12
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    Hey mate ... I've got to rush out the door right now to Kat - Tombstone - not sure when I will be backl; can I call you tonight on your landline? Either mail me you home phone or leave it on my machine and I'll call you tonight and see if we can organize a meet up ... I might be able to work it. They moved the Easter show from where it used to be in the City ... I've never been since I was a kid so I have no idea where they have it these days?

    Talk to ya tonight.

  3. #13
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    No worries, the number will be on your answering machine. Matt
    <a href=https://the4wdzone.com.au/wp-content/uploads/logo.png target=_blank>https://the4wdzone.com.au/wp-content/uploads/logo.png</a>
    The 4wd Zone/Opposite Lock Bathurst
    263 Stewart Street, Bathurst, NSW
    http://www.the4wdzone.com.au/
    Discounts for AULRO members, just shoot me a PM before you purchase.

  4. #14
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    Point Cook Melbourne
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    Quote Originally Posted by Tikirocker
    Hey Matt!

    It's a High Ratio Transfer Case conversion on the transmission of Series gearboxes to allow higher gearing to bring down the revs for Holden type engines. Essentially you get about 30% improvement in speed and the conversion only effects the gearing in High Ratio but not low ... there is also some improvement in fuel consumption. The HRTC has often been the alternative to the Overdrive like the Fairey over the years and is way stronger than the Overdrive which is quite fragile and has a very low oil capacity. There are definite benefits of the HRTC over the Overdrive depending on the engine you have ... generally for Series owners with the Holden donk the HRTC is the way to go.

    BTW - check my reply to your post in my Gearbox thread!

    Best, Simon.
    TriRocker - Would I get better torque at lower RPM if I had reduced my diff ratio as well as implementing the HRTC?

  5. #15
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    And, who performs these HRTC conversions now (in VIC)?

  6. #16
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    Quote Originally Posted by Land-lord
    And, who performs these HRTC conversions now (in VIC)?
    It should be a pretty easy DIY job.

    Drain the T/C oil while you remove the floor. (30min)

    Remove the Tail shafts, T/C sump and hand brake. (40min)

    Remove the intermediate T/C shaft & gears. (20min)

    Remove the T/C. (30min)

    Refit in reverse order after lunch.

  7. #17
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    And, who performs these HRTC conversions now (in VIC)?

  8. #18
    crossy Guest
    Quote Originally Posted by Land-lord
    And, who performs these HRTC conversions now (in VIC)?
    It's pretty much a diy thing.

  9. #19
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    Quote Originally Posted by crossy
    It's pretty much a diy thing.
    Not any that I have seen - They have to weld up the hole where the intermediate shaft currently sits and bor a new one. So you can buy a case that has already been welded and bored and all the gears, but they want your old case back when you are finished.

  10. #20
    crossy Guest
    Quote Originally Posted by isuzurover
    Not any that I have seen - They have to weld up the hole where the intermediate shaft currently sits and bor a new one. So you can buy a case that has already been welded and bored and all the gears, but they want your old case back when you are finished.
    yep - I meant diy fitting of the supplied kit.

    Tip - get the kit from interstate, they won't require a changeover case (too much trouble with shipping). Saves been out of action for a bit longer. I found getting mine from QLD was $50 cheaper than from a vic supplier even after paying freight.

    Putting the case together is stupid easy - as long as you ignore the workshop manuals method of setting the op shaft preload!

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