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Thread: 4 Pinion Rover Diff

  1. 31st December 2008, 12:43 PM #1
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    4 Pinion Rover Diff

    I need some advice I am trying to replace the 2 pinion diff in the front of my Stage 1 with a 4 pinion diff.
    I can get an ex army hemisphere part no FRC8625 but Im not sure if this carrier is for a 6x6 which means it will be for a 4.7.
    I need a carrier for a 3.54 does anyone know if you can machine the 4.7 carrier to accept the 3.54 crown wheel??
    Or should I just buy a Jack Mac centre
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  2. 31st December 2008, 12:51 PM #2
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    Making a MaxiDrive fit where it shouldn't
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  3. 31st December 2008, 12:59 PM #3
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    Thanks
    Looks like if I machine 3/16 of an inch from the carrier it should work
    Suspicious if Mal was suggesting it wasnt a good idea.
    Maybe Ill just buy a Jack Mac
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  4. 31st December 2008, 01:02 PM #4
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    Rovercare
    I see a post back in August indicating you had a 4 pinion 10 spline for sale is this still true??
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  5. 31st December 2008, 02:43 PM #5
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    Quote Originally Posted by djam1 View Post
    Rovercare
    I see a post back in August indicating you had a 4 pinion 10 spline for sale is this still true??
    Unfortunately not, it now resides in Fitzroy Crossing
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  6. 31st December 2008, 03:19 PM #6
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    Ah Davo I presume
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  7. 31st December 2008, 03:25 PM #7
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    Quote Originally Posted by djam1 View Post
    Ah Davo I presume
    That's correct

    He also has a 3.9L rover motor from me

    He's a joy to deal with.............but I hate packing for him, it must be a rough ride
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  8. 31st December 2008, 05:33 PM #8
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    Could you fit a Truetrac LSD? Might be better value for money.
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  9. 31st December 2008, 05:46 PM #9
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    Thanks guys the people who offered me the military centre said they would supply the complete assembly modified with a reco diff.
    I am as pleased as punch the price was good so cant wait to see it
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  10. 31st December 2008, 06:31 PM #10
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    Smile

    FRC8187 is the differential case (4 pinion) for the 4X4 3.54 ratio diff. That will be a 6X6 4.7 ratio one that you have. Rather than machine the carrier and possibly weaken it I would have the crown wheel machined. From memory I think you have to machine 3/16 inch off. It wont weaken the crown wheel as there is plenty of meat on it. I have a 4 pinion one in my front diff and they are much better than the 2 pinion ones especially if you put the 24 spline axles in as well
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