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Thread: Overdrive

  1. #1
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    Overdrive

    Hey all I have had a bit of time to investigate the Range Rover that was collected in need of a clutch according to the previous owner. Clutch is fine, box is fine, transfer is fine (4thou float on the intermediate). Overdrive is not. This Range Rover has what I can work out to be the LT95 with optional overdrive. Further learning that parts are difficult to get has lead me to the conclusion I will remove it and refurbish it as I find the parts. In the interim I would like to remove the overdrive and run it as a 4 speed. Can you helpful people advise 2 things.
    1. does the box have to be lowered at the back by removing the mounts and member and lowering to remove the overdrive? It looks like it will hit the floor with the box in situ.
    2. what parts do I need to remove the od? Looks like a bearing housing and a new input gear? Does anyone have what I need available second hand? I’m in the Newcastle area.

    many thanks in advance.
    Dan.

  2. #2
    Homestar's Avatar
    Homestar is offline Super Moderator & CA manager Gold Subscriber
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    Not sure about removal as I’ve only done one in my 101 which has heaps of room, but there is a gear a, retainer and the cover. If I can find all the bits I do have spares as I have 2 LT95’s - I’ll have a look tomorrow.

    Don’t go pulling it apart without reading up on it - you’ll need to have the box in third gear I think something falls off inside the box.

    Hopefully Bearman will poke his head in and make us all wiser. He is a guru on these boxes. 👍
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.

  3. #3
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    Thankyou, done a lot of reading and it sounds like chaos if you don’t have it in 3rd or is that 4th gear (depends what you read) some shims fall down on a stepped shaft and can often result in removal of the box. Not jumping into it in any case. For your viewing pleasure here is the vehicle, picked up after being idle for 15 years covered with a tarp under a barn, I’d just given it a hose off. First water it’s seen in the last 15 years. BD4EDC0E-9C45-43CA-9C7A-50C4ADB1A7AE.jpg

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    It's been about 25 years but AFAIR you do not need to lower the box.
    The trick is to get all the shims back onto the output shaft of the gearbox once you have fitted the OD gear and I must admit I gave up and still have it in the garage.
    This eventually caused it to jump out of low range when very hot.
    Mine had very worn input shaft bearings when I got it and the inner shaft was brinelled, but you can get same size ID and OD bearings that have an inner track integral.

    I must say that with a standard engine when you were in hilly country it was quite a "soft shoe shuffle" of changing gears and overdrive to keep the engine on the boil.
    Regards PhilipA

  5. #5
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    Thanks Phillip, appreciate the feedback. When I do attack it I’ll let you know if I could get it out with the box up on its mounts. The reason I asked is I didn’t think you could get it off as when I looked up inside the transfer from the bottom the overdrive cast housing protruded into the transfer a fair way and looked like it wouldn’t withdraw sufficiently to allow removal.
    regards, Dan

  6. #6
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    At the risk suggesting something potentially nonsensical, would you not consider perhaps a more modern 5 speed and LT230? aka D1 for example?

    My reason for suggestion would simply relate to the ability to separate TC from gearbox and bellhousing, ease of access etc, but I do understand that the LT95 also has a 'shelf life'

    Given there are so many R380/LT230 boxes around these days (or heaven forbid, ZF4HP22/24's and BWTC) Wouldn't pursuing a more modern (and possibly more reliable due to age) transmission would be a worthwhile investigation?

    Note that I am not against rebuilding a gearbox that is already a 'known entity'. I do understand the difference in economics and effort.

    Also, I am not an LT95 expert either.

    Having said that, it would seem that almost everyone who has come across one of these with 'issues' has encountered some kind of terminal damage upon further inspection, which results in purchase of one or more additional units to make a single "good one" which to me sounds uneconomical.

    If remaining original is of paramount importance that's a clearly understood choice.

    However I may be the only one to offer a potentially unpopular suggestion to move to something more modern with less KM on it if longterm reliable regular use is the end goal.

    Yes, I am aware that the R380 is not perfect either. There are a lot more parts available as well as off-the-shelf reco'd units and the conversion is not going to devalue the vehicle IMO.

    Still, if the LT95 only has minor problems, then the R&R is inexpensive, it's only the replacement parts which become wallet-fleecing.
    Roads?.. Where we're going, we don't need roads...

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