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Jeep 4.0 Engine

Discussion in 'Defender 90 / 110 / 130' started by nesponge, Mar 7, 2015.

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  1. nesponge

    nesponge Active Member

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    Gearbox arrived... unfortunately it's got the wrong output shaft, but for the price I couldn't say no.

    It's off to American Automatics, for a full teardown, output shaft swap and inspection and then we should be good to go.

    [​IMG]
     
  2. nesponge

    nesponge Active Member

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    Latest update... gearbox back from Jon @ American Automatics... first rate job I would recommend his service to anyone.

    Lightly rebuilt and inspected with correct rear output shaft installed.

    http://www.americanautomatics.co.uk/services

    Some pics

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    Next step is to get it bolted up to the engine and transfer case
     
  3. Brown

    Brown Well-Known Member Full Member

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    Looks lovely. It's so gratifying when they come back clean like that.
     
  4. IamRobbie

    IamRobbie Well-Known Member

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    Just stumbled across this thread and I like it already!
     
  5. FlyingPete

    FlyingPete Well-Known Member

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    That maze of oil channels still turns my brain crazy :D
     
  6. nesponge

    nesponge Active Member

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    It's weirdly like a brain in itself? :)

    Latest update... my torque converter is not compatible with the flexplate/flywheel supplied by Novak in the kit.

    My flexplate is 3 bolt 10.75 inch spacing (standard chevrolet), however my torque converter is 6 bolt 11.5 inch spacing (heavy duty). It also has a very low stall speed as it was designed to sit behind a massive torque monster 6+ litre V8 so even if it fitted, would probably bog my little jeep 4 litre engine down.

    Therefore I have decided to acquire a new torque converter which will work with the Jeep flexplate and also give me a higher stall for a bit more performance off the line.

    Hughes performance in the USA supply dual bolt pattern converters compatible with the 4l80e... I guess that's my next stop and a bargain at only £450 :( If I ever upgrade to a V8 in the future I can reuse the converter so it's not all bad.

    http://www.jegs.com/i/Hughes+Performance/512/25-25L/10002/-1
     
    GATSO likes this.
  7. ifloochies

    ifloochies Well-Known Member

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    Shame about the torque converter, but I'm sure it's all gonna be a distant memory soon enough when you have it all bolted together... can't wait to see this finished.
     
  8. ifloochies

    ifloochies Well-Known Member

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    Bump....Anything new done so far?
     
  9. ARCXJ

    ARCXJ Member

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    BUMP!! This was too promising to fail!
     
  10. adrian hogg

    adrian hogg Well-Known Member

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    Just found this thread and am loving your work,I am a big fan of that straight six had one in a cherokee ,super smooth and would exceed 100mph without effort.( 140,000 miles never missed a beat and would smoke the tyre in 2 wheel drive mode.. Keep us informed please.
     
  11. discomania

    discomania Well-Known Member

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    This is all possible, it comes down to how much you are prepared to spend and your aptitude for mechanical engineering and design.

    If it was me I would look at dropping the engine mated to a LR R380 gearbox to keep the drive from the gearboxes back stock (read easier to get parts for etc.) I would not put it onto an LT77 - I cannot stress enough how much I would not do this. You will tear it apart very quickly, especially if this engine has legendary low down torque, so in your case maybe the Jeep auto is the way to go, but work from the transfer-box position forward if you can.

    As for mating them - you will want to become friends with a fabricator/machine shop who can produce accurately cut and and drilled plates and adaptors etc.
     
  12. ARCXJ

    ARCXJ Member

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    I also had the 4.0 in a Cherokee - same experience as you Adrian - beast of an engine, mine just needed a new plug on no.3 every now and again 'cause the LPG made it run hot. I wouldn't imagine the torque figures to exceed that of a TD5 etc lower down but it's got more than most petrol engines for sure.
     
  13. Shippers

    Shippers Well-Known Member

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    He's already got the adapters see pics above in previous posts...
     
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