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Thread: Series 3 stage 1 gearbox conversion

  1. #1
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    Series 3 stage 1 gearbox conversion

    Could anyone recommend what would be the best 5 speed gearbox to install on the series 3 stage 1 landrover to replace the LT95, would it drop the revs much at 100kph.
    Also, has anyone done the power steer conversion and is it a big job, can anyone recommend a company to buy the power steer kit from? Cheers, Scotty

  2. #2
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    First up, whats your budget?

    Choices that are available that i'm aware of are,
    R380
    Isuzu MSA/MXA
    Tremec tr4050

  3. #3
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    Quote Originally Posted by Vern View Post
    First up, whats your budget?

    Choices that are available that i'm aware of are,
    R380
    Isuzu MSA/MXA
    Tremec tr4050
    Also from the LR stable - LT77 and LT85.
    REMLR 243

    2007 Range Rover Sport TDV6
    1977 FC 101
    1976 Jaguar XJ12C
    1973 Haflinger AP700
    1971 Jaguar V12 E-Type Series 3 Roadster
    1957 Series 1 88"
    1957 Series 1 88" Station Wagon

  4. #4
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    Quote Originally Posted by 101RRS View Post
    Also from the LR stable - LT77 and LT85.
    Lt77 not behind a 4bd1 though.
    Lt85 yes, but why of whySeries 3 stage 1 gearbox conversion

  5. #5
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    Quote Originally Posted by Vern View Post
    Lt77 not behind a 4bd1 though.
    Lt85 yes, but why of whySeries 3 stage 1 gearbox conversion
    Well the mistake both of us made was firstly not asking the OP what engine were we talking about .

    You assumed diesel - I assumed V8 . The fact he wants revs reduced at 100kph indicates a V8 to me.

    Of course the OP should have made that clear.
    REMLR 243

    2007 Range Rover Sport TDV6
    1977 FC 101
    1976 Jaguar XJ12C
    1973 Haflinger AP700
    1971 Jaguar V12 E-Type Series 3 Roadster
    1957 Series 1 88"
    1957 Series 1 88" Station Wagon

  6. #6
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    Quote Originally Posted by 101RRS View Post
    Well the mistake both of us made was firstly not asking the OP what engine were we talking about .

    You assumed diesel - I assumed V8 . The fact he wants revs reduced at 100kph indicates a V8 to me.

    Of course the OP should have made that clear.
    No mistake on my behalf, I know he has an isuzu from another post he made. Series 3 stage 1 gearbox conversion

  7. #7
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    Quote Originally Posted by Vern View Post
    No mistake on my behalf, I know he has an isuzu from another post he made. Series 3 stage 1 gearbox conversion
    Thats cheating - you can only respond to the information provided in the thread.
    REMLR 243

    2007 Range Rover Sport TDV6
    1977 FC 101
    1976 Jaguar XJ12C
    1973 Haflinger AP700
    1971 Jaguar V12 E-Type Series 3 Roadster
    1957 Series 1 88"
    1957 Series 1 88" Station Wagon

  8. #8
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    Gearbox mods and power steer for stage 1.

    Sorry Guys, i should have mentioned in my original post that the stage 1 I have got is the Isuzu 4BD1 motor with the 4 speed box. I am trying to find the strongest 5 speed box that I can get to go behind that motor to drop the revs down substantially when it is sitting on a 100kph as it is screaming its lungs out and is as noisy as…

    Also, has anyone done a power steer conversion to one of these and what company did you use. The only good thing is i don’t need to go to the gym after taking it for a drive :-). Cheers, Scotty

  9. #9
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    [QUOTE=Scozzzy;3146351]Sorry Guys, i should have mentioned in my original post that the stage 1 I have got is the Isuzu 4BD1 motor with the 4 speed box. I am trying to find the strongest 5 speed box that I can get to go behind that motor to drop the revs down substantially when it is sitting on a 100kph as it is screaming its lungs out and is as noisy as…

    At the risk of asking a stupid question - are you sure that your LT95 box has the Isuzu High range gears? It sounds like you may have the lower transfer case ratio from a V8? Is it possible that the box has been swapped in from a V8 at some stage?

    Apologies if you've checked this possibility, but the description of the engine 'screaming' sounds strange.

    Michael


    110 300tdi (1999)
    110 V8 County (1984)
    SIII 'Game' (1977)

  10. #10
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    I've got a Stage One V8, and have looked at fitting a R380/LT230 and LT85/LT230, neither will fit without modifying the seatbox and floor. The R380 is too tall in the back and hits the seat box, the LT230 hi/low casing hits the floor/seatbox.
    The output flanges of the LT230 are fairly close to where they are with the LT95, within 25mm from my quick measurements.

    Hope this helps,

    Tim

    R380/LT230 on the left, LT95 on the right.

    20181227_121255.jpg

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