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Thread: XJ40 lsd diff

  1. #1
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    XJ40 lsd diff

    Hi I'm looking for an XJ40 lsd diff anyone got one for sale ?
    I'm going to Stoneleigh so that might be a possibility for collecting it ?

  2. #2
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    AK Gen II delivery date Oct '15
    GM Vortec LQ4 364ci
    Tremec T56 Terminator.

  3. #3
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    Quote Originally Posted by AKCobra View Post
    That is a XJ6 diff and not a XJ40 which are different.
    Martin

    351W 416.7 HP and 466.8 ft-lbs

    Running Mega Squirt and Edis 8


  4. #4
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    Buy that and a standard open XJ40 unit and I'll build you one LOL.

  5. #5
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    I'm looking for a 3.3 to 1 ideally I need to reduce motor rpm at motorway speeds
    It's a bit expensive more than most breakers yards too
    Thanks anyway

  6. #6
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    If your propshaft has a three-bolt flange on the rear end, the diff you need is a 3.27:1 LSD from a Jaguar XJR.

    There's an XJR diff listed on eBay here, but if doesn't give the ratio or whether it's an LSD or open. But at £125 plus £25 carriage with a three month warranty, it's worth a shot!

    Alan

    Quote Originally Posted by Pickmaster View Post
    I'm looking for a 3.3 to 1 ideally I need to reduce motor rpm at motorway speeds
    It's a bit expensive more than most breakers yards too
    Thanks anyway
    Alan

    CRC Thames Valley Regional Rep
    UK Rep for European Cobra Club
    Dax Tojeiro DeDion - Huddart SBC 383

  7. #7
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    Quote Originally Posted by russell_ram2 View Post
    Buy that and a standard open XJ40 unit and I'll build you one LOL.
    Wouldn't be the first time, eh
    My DeDion build diary..
    Hon Sec of the Digidash branch of the Unpopular Kit Car Design club

  8. #8
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    I've searched further, and the guy has another XKR listed for £75 plus £25 carriage - here. This one's for a 3.2, whereas the previous one's for a 4.0, and he's used the same lo-res photo for both!

    Regarding the diff flanges - some have three and others four bolt flanges. My Dax De Dion had a 3.54 or 3.58 (can't remember now!) XJ40 LSD with a 3 bolt flange, and the 3.27 XJR LSD was a straight replacement. If the labels are still on the XJR diffs, the 3.27 ones have a orange with black cross label - so you could ask the guy to check and confirm the number of flange holes and whether it's LSD or open!

    Alan
    Alan

    CRC Thames Valley Regional Rep
    UK Rep for European Cobra Club
    Dax Tojeiro DeDion - Huddart SBC 383

  9. #9
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    D'oh!!!! In my previous post, "XKR" should read "XJR diff" - but I can't edit it for some strange reason!
    Alan

    CRC Thames Valley Regional Rep
    UK Rep for European Cobra Club
    Dax Tojeiro DeDion - Huddart SBC 383

  10. #10
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    Wow thanks I'm sorted this forum is ace, well the people on it are
    Thanks again 👍

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