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Thread: Newcomer with LT85 question

  1. #21
    Join Date
    Oct 2009
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    Canberra ACT
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    "I'm thinking removing the gearbox from the vehicle and separating it from the transfer case and presenting the box to either CMW (Ray) or similar venue. This seems sensible. This would lower the all up cost (removing the remove/refit element of the invoice) quite significantly perhaps to the tune of $800 or so, maybe more...The job would take about three to four or so hours (removal). It's a pretty straight forward job but best performed by two. Anyone interested in assisting? This is a two way street of course....
    Just wondering...." [/QUOTE]

    If you'll be working on it in Canberra, give us a yell. Don't mind crawling around under a Landy, even if it's someone elses!

  2. #22
    Join Date
    Dec 2010
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    Batemans Bay mostly, and Brisbane
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    Assist work

    Quote Originally Posted by AdsLandies View Post
    "I'm thinking removing the gearbox from the vehicle and separating it from the transfer case and presenting the box to either CMW (Ray) or similar venue. This seems sensible. This would lower the all up cost (removing the remove/refit element of the invoice) quite significantly perhaps to the tune of $800 or so, maybe more...The job would take about three to four or so hours (removal). It's a pretty straight forward job but best performed by two. Anyone interested in assisting? This is a two way street of course....
    Just wondering...."
    If you'll be working on it in Canberra, give us a yell. Don't mind crawling around under a Landy, even if it's someone elses![/QUOTE]

    Poor bastar.. Most people run away from this sort of thing lol
    Will contact after getting further opinion on the symptoms in two weeks. I haven't done this on a 110 before.

  3. #23
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    Mar 2007
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    Sunshine Coast
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    Quote Originally Posted by AdsLandies View Post

    If you'll be working on it in Canberra, give us a yell. Don't mind crawling around under a Landy, even if it's someone elses!

    Quote Originally Posted by Svengali0 View Post
    Poor bastar.. Most people run away from this sort of thing lol
    Actaully I prefer someone else's vehicle... when it is your own you start thinking/worrying about all the stuff you see that should be fixed. When it's some one else's you can just poke and laugh

  4. #24
    Join Date
    Dec 2010
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    Batemans Bay mostly, and Brisbane
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    outcome from expert assessment

    Quote Originally Posted by Svengali0 View Post
    Hi Everyone.

    I'm new here but have been reading the various posts for a while. Great to see this is a good community to share and find advice.

    I am however not new to L/R and my current car, an '85 County LT85 standard 4BD1 is the 4th Isuzu powered L/R. Previous cars include civilian 6x6 4BD1T, a stage 111 ute 4BD1 (sans baffle kit on the engine and it was a 'chirpy' little thing too...) and a conversion 4BA1 into a Ser111 ute over 15 years ago (that was fun- the conversion plate was a 'Zenith' engineering kit (Milton, Brisbane) that left a bit to be desired).

    I won't mention how many Ser 1, 11, 11a and 111's I have had. I couldn't help myself for a few years there and I just bought 'em no matter where they were- mostly diesels too. But my days of putting up with the old Rover diesel have long passed....


    Anyway, the '85 County is getting just on 800km to it's 75 litre non standard tank (255/85/16 BFG muddies) so mileage is good.

    This car has been all over Australia (previous owner used to take photos in the outback, and he sent through pics of the vehicle being featured in an Indian Cigarette commercial at one point about 12 or so years ago). I can dig up these pics and post if any one is interested...

    Turns out that while the blessed 4BD1 has had nill work performed to it outside regular oil and filter changes, and pump/injector overhaul at about 365k's (now 540k's and still won't use oil or get hot)- the LT85 has been rebuilt about three times- and the last rebuild (unsure when, possibly early 400k) included modifying the bearings to take larger, beefier items more suited to load requirements.

    This was apparently done in far North QLD.


    I've been reading the threads regarding experiences with the LT85 and this has proved very useful.

    Through this, I have taken note of opinions that the gearbox primary input shaft bearings appear to get stressed out especially through sustained running in fifth gear (I do a few long trips every now and then- mostly in fifth as you do...).

    I have a symptom that is some cause for concern.

    I can't tell if the throwout bearing/clutch release bearing is noisy of if the primary input shaft bearing is about to die. There is a noticeable metallic clicking at idle that disappears when I depress the clutch. Fairly recent onset (within the last 3k). The clutch itself is about at the point of it's half life by appearances.

    Does anyone have advice about diagnosis? If one or more of the bearings inside the box is about to go then it would be sensible to pull the thing down and have it addressed- but there are significant costs in this even if I do it myself....
    What to do...

    Oh, gearbox oil recently replaced with 75/85 grade castrol mineral oil improved gear shifts significantly. There is almost no noise coming from the drive train apart from a distant muted whine (it is land rover after all).

    The gearbox oil was fairly dark, appeared to be correct grade oil- and there was noticeable brassy elements in the bottom of my collection pan when the drained out oil sat over night.


    Opinions???

    I paid a considerable amount of money to Canberra Motor Works (Ray) to assess the gearbox short of pulling the thing down and undressing it to the last bush and circlip and he says that it's good as far as he can tell. Reckons the thing is 'In pretty good condition for a County'
    So- thats probably good feedback. Hope I can take it to the bank in relative terms- Better to be a worry-wort than being stuck at some god forsaken point between Dunedoo and Cowra with a dead gearbox though....
    So this is the good news. Maybe upgrading the LT85 is worth the effort? Time will tell.
    Ray also said (when asked) that a turbo motor should not overload the present transmission arrangement if it's a low blow item <7psi or so.

  5. #25
    Join Date
    Aug 2006
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    Kingston, Tassie, OZ.
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    Ray certainly seems to know his stuff, so I am in no doubt that he has given good advice, BUT I have still seen and heard of many of these LT85's both NA and Turboed, fail earlier than they should behind a 4BD1. I would still consider an LT95 or better still a Grubb MSA conversion.

    Another school of thought is that some bellhousings/ engine adapter housings to suit the LT85 to 4BD1 were machined out of centre, up to .040" apparently, which is a sure reason for front input brg failure. My uncle had 3 rebuilds with his LT85, finallly at 300K it had the bellhousing etc measured for concentricity and it was found to be out, it was then rectified and it did a further 150,000 trouble free km before vehicle was pulled apart. The trans was then fitted to a 4BD1T that pumped out some serious torque, and after towing 2+ tons in 5th a LOT, it finally gave up by spinning 5th on the mainshaft and then was substituted for a LT95. I agree ratios etc are better, but overall reliability in my book is paramount.

    Just my feelings on the subject


    JC

  6. #26
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    Aug 2020
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    Torquay vic 3228
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    Quote Originally Posted by Svengali0 View Post
    I paid a considerable amount of money to Canberra Motor Works (Ray) to assess the gearbox short of pulling the thing down and undressing it to the last bush and circlip and he says that it's good as far as he can tell. Reckons the thing is 'In pretty good condition for a County'
    So- thats probably good feedback. Hope I can take it to the bank in relative terms- Better to be a worry-wort than being stuck at some god forsaken point between Dunedoo and Cowra with a dead gearbox though....
    So this is the good news. Maybe upgrading the LT85 is worth the effort? Time will tell.
    Ray also said (when asked) that a turbo motor should not overload the present transmission arrangement if it's a low blow item <7psi or so.
    can any one tell me how this all turned out? I have same setup same problem. Except mine only dose it after a bit of a drive when everything is warm. It's a kind of rattling ticking noise
    I'd be interested to know if the noise ended up amounting to more or if it turned out to be because of some thing else.

  7. #27
    Join Date
    Dec 2010
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    Batemans Bay mostly, and Brisbane
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    Quote Originally Posted by Jesse.s View Post
    can any one tell me how this all turned out? I have same setup same problem. Except mine only dose it after a bit of a drive when everything is warm. It's a kind of rattling ticking noise
    I'd be interested to know if the noise ended up amounting to more or if it turned out to be because of some thing else.

    sorry mate..I'm between LR at the moment and this old post was ancient history. No the LT85 was fine, it was me worrying. THe rattling on idle, going away when the clutch depressed was completely normal, and each oil change demonstrated nil abnormal inclusions, no gear change issues or dropping under trailing throttle.
    Note however that this box had been modified at great expense by the previous owner...having suffered no less than three catastrophic events over the several years of ownership prior to him going to an a transmission and engineering firm in FNQ following the last failure. He was no certain exactly what they did but it never failed after that last rebuild and through the years that I had it.

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